Welcome to Acta Agronomica Sinica,

Acta Agronomica Sinica ›› 2020, Vol. 46 ›› Issue (8): 1225-1237.doi: 10.3724/SP.J.1006.2020.03007


Critical nitrogen dilution curves and nitrogen nutrition diagnosis of spring maize under different precipitation patterns in Weibei dryland

LIU Peng-Zhao,SHI Zu-Jiao,NING Fang,WANG Rui,WANG Xiao-Li,LI Jun()   

  1. College of Agronomy, Northwest A&F University/Key Laboratory of Crop Physiecology and Tillage Science in Northwestern Loess Plateau, Ministry of Agriculture, Yangling 712100, Shaanxi, China
  • Received:2020-01-31 Accepted:2020-04-15 Online:2020-08-12 Published:2020-05-08
  • Contact: Jun LI E-mail:junli@nwsuaf.edu.cn
  • Supported by:
    National Key Technology Support Program of China(2015BAD22B02);National High Technology Research and Development Program of China (863 Program)(2013AA102902);National Natural Science Foundation of China(31801300)


The excessive nitrogen (N) applications, large rainfall variations and poor water-nitrogen couplings are main problems to efficient nitrogen fertilizer uses in spring maize production of Weibei dryland. Critical nitrogen dilution curves under different rainfall scenarios in Weibei dryland were constructed in this study to analyze the feasibilities of diagnosing and evaluating nitrogen nutritional conditions in terms of nitrogen nutrition index (NNI), which would provide a theoretical basis for reasonable nitrogen fertilizations application of dryland maize in response to different rainfalls. The experiment design using Zhengdan 958 (ZD958) and Shaandan 8806 (SD8806) as tested materials was five treatments level, N applied at 0(N0), 75(N1), 150(N2), 270(N3), and 360(N4) kg hm-2 in 2016 and 2017, and at 0(N0), 90(N0), 180(N2), 270(N3), and 360(N4) kg hm-2 in 2018 and 2019, respectively. It was rainy at the ear stage and dry at the grain stage in 2016 and 2018, whereas dry at the ear stage and rainy at the grain stage in 2017 and 2019. Critical nitrogen dilution curve models for spring maize with two precipitation patterns were constructed and verified using the data collected in the four-year position nitrogen fertilization experiment. The results showed that: (1) increased nitrogen fertilizer application significantly increased aboveground biomass and plant N concentrations, and there were significantly different among different treatments. Both critical nitrogen concentrations (Nc) and aboveground biomass conformed the exponential relations with the two precipitation patterns, but there were differences between the parameters of the models for these relations (a. Rainy at the ear stage: Nc = 35.98DM-0.35; b. Dry at the ear stage: Nc = 35.04DM-0.23). The relatively stable model had a linear correlation between the fitted and actual plant N concentrations, which shown that the RMSE and n-RMSE were 1.03 and 5.75% at the ear stage over the rainy years and 1.53 and 6.78% at the ear stage in the dry years, respectively. (2) at the different growth stages, NNI were increased with the increased application, and there were differences in the optimal nitrogen application under different precipitation conditions. The optimum N rate in the form of basal fertilizers was 150-180 kg hm-2, and in the form of top dressing fertilizers was 45-75 kg hm-2 at the ear stage in the rainy years. The nitrogen nutrition index (NNI) was significantly correlated with relative nitrogen uptake (RNupt), as were relative aboveground biomass (RDW) and relative yield (RY). When the NNI was 1.02 at the ear stage in the rainy years, the maximum RY was 0.95; and when the NNI was 1.08 at the ear stage in the dry years, the maximum RY was 0.92. The critical nitrogen dilution curve model and nitrogen nutrition index model constructed in this study were able to accurately predict nitrogen nutrition conditions from jointing stage to maturity stage under the two precipitation patterns of spring maize. They would provide an important guidance for nitrogen diagnosis and fertilization application in maize growing stage.

Key words: precipitation pattern, Weibei dryland, spring maize, critical nitrogen dilution curve, nitrogen nutrition index

Fig. 1

Precipitation distributions at the different growth stages from 2016 to 2019 VE-V3: from emergence stage to third leaf stage; V3-V6: from third leaf stage to jointing stage; V6-VT: from jointing stage to tasseling stage; VT-R3: from tasseling stage to milk stage; R3-R6: from milk stage to maturity stage."

Table 1

Aboveground biomass at the different growth stages and grain yield of dryland spring maize at the different N rates"

N rates
地上部生物量 Aboveground biomass (t hm-2) 籽粒产量
Grain yield (t hm-2)
V6 VT R3 R6
2016 郑单958 N0 2.17 d 4.78 e 9.67 d 18.22 d 9.98 c
ZD958 N75 3.13 c 5.68 d 11.39 c 20.13 c 10.89 b
N150 3.39 b 6.18 c 13.36 b 21.4 b 11.87 a
N270 3.46 a 7.02 b 14.91 a 21.93 a 12.22 a
N360 3.31 b 7.85 a 15.25 a 22.22 a 11.89 a
陕单8806 N0 2.07 c 4.94 e 10.47 e 18.17 d 9.77 b
SD8806 N75 2.41 b 5.46 d 12.39 d 19.42 c 10.14 b
N150 2.46 b 6.11 c 13.36 c 20.58 b 10.68 a
N270 2.67 a 7.11 b 14.61 b 20.97 b 10.97 a
N360 2.86 a 7.55 a 17.25 a 22.64 a 10.99 a
2017 郑单958 N0 2.10 d 3.78 d 4.97 d 10.22 d 2.22 e
ZD958 N75 2.13 d 4.68 c 6.98 c 12.13 c 2.78 d
N150 2.39 c 5.20 b 8.96 b 13.40 b 4.47 a
N270 2.86 b 6.35 a 9.03 b 14.93 a 4.12 b
N360 3.31 a 6.78 a 9.24 a 15.22 a 3.43 c
陕单8806 N0 2.23 c 3.78 d 4.87 d 9.17 e 2.31 e
SD8806 N75 2.31 c 4.68 c 5.98 c 10.42 d 3.02 d
N150 2.49 b 5.13 b 8.98 b 12.59 c 4.17 b
N270 2.43 b 6.35 a 9.01 b 13.97 b 4.29 a
N360 3.08 a 6.71 a 9.14 a 14.64 a 3.80 c
2018 郑单958 N0 2.23 d 5.11 d 9.97 e 13.45 d 6.72 d
ZD958 N90 2.81 c 6.16 c 12.39 d 17.42 c 9.68 bc
N180 3.09 c 6.90 b 13.36 c 22.29 b 9.82 ab
N270 3.33 b 7.22 a 14.61 b 23.03 a 10.12 a
N360 3.48 a 7.65 a 15.25 a 23.14 a 9.42 c
陕单8806 N0 1.91 c 4.62 d 8.93 d 15.06 d 5.67 d
SD8806 N90 2.69 b 5.11 c 12.72 d 18.02 c 7.64 c
N180 3.11 a 6.86 b 13.51 c 20.80 b 9.75 b
N270 3.22 a 7.10 a 15.99 b 21.90 a 10.26 a
N360 3.24 a 7.22 a 16.29 a 21.3 a 9.83 ab
2019 郑单958 N0 2.08 d 3.78 e 4.57 d 9.87 d 3.21 d
ZD958 N90 2.41 c 4.68 d 5.98 c 10.02 c 3.85 c
N180 2.85 b 5.83 c 9.76 a 13.98 a 5.05 a
N270 2.86 b 7.35 a 9.62 a 13.97 a 4.61 b
N360 2.96 a 6.80 b 9.24 b 13.64 b 4.44 b
陕单8806 N0 2.01 c 3.48 d 4.97 d 9.87 e 2.85 d
SD8806 N90 2.69 b 4.58 c 6.98 c 10.42 d 3.75 c
N180 2.81 a 6.23 b 8.76 b 12.58 c 4.32 b
N270 2.91 a 6.35 b 8.83 b 14.07 a 4.91 a
N360 2.84 a 6.61 a 9.03 a 13.84 b 4.03 bc

Fig. 2

Plant N concentrations at different stages of dryland spring maize under the different precipitation patterns a: rainy at the ear stage; b: dry at the ear stage. V6: jointing stage; VT: tasseling stage; R3: milk stage; R6: maturity stage. Nitrogen was applied at N0, N1, N2, N3, and N4, that is, 0, 75, 150, 270, and 360 kg hm-2 from 2016 to 2017, and at 0, 90, 180, 270, and 360 kg hm-2 from 2018 to 2019."

Table 2

Variance analysis of aboveground biomass, nitrogen uptake, and grain yield at different stages of dryland maize"

V6 VT R3 R6 籽粒产量
Grain yield (t hm-2)
郑单958 ZD958 2.82 23.50 6.11 18.49 10.43 15.56 16.53 12.49 7.04
陕单8806 SD8806 2.71 23.78 5.78 18.05 10.52 15.67 16.02 11.98 6.66
2016 2.79 23.43 6.27 16.87 13.27 12.67 20.57 10.16 10.94
2017 2.53 23.56 7.72 20.11 7.72 18.45 12.67 16.81 3.46
2018 2.91 23.63 6.41 17.27 13.31 12.07 19.64 10.36 8.89
2019 2.64 23.48 6.57 20.51 7.78 18.85 12.23 16.41 4.10
N0 2.10 20.11 4.28 15.43 7.30 12.55 13.01 9.59 5.34
N1 2.57 22.13 5.13 17.04 9.35 14.05 14.75 10.73 6.47
N2 2.82 23.19 6.06 18.57 11.26 16.02 17.20 12.94 7.52
N3 2.97 25.63 6.86 20.35 12.08 17.12 18.11 14.02 7.69
N4 3.14 26.45 7.15 21.06 12.59 18.05 18.33 15.15 7.23
年份Year(Y) 6.10** 0.22NS 164*** 219*** 4938*** 831*** 5133*** 885*** 11735***
品种Variety(V) 0.59NS 0.85NS 1.11NS 0.96NS 1.31NS 0.37NS 0.72 NS 0.38 NS 143***
施氮量Nitrogen(N) 33*** 1675*** 714*** 278*** 1947*** 335*** 1110*** 414*** 654***
年份×品种Y×V 0.29NS 0.28NS 0.71NS 0.32NS 0.45NS 0.12NS 0.81NS 0.13NS 34***
年份×施氮量Y×N 1.74NS 35*** 9.31** 4.61* 35*** 14*** 58*** 11.21** 44***
品种×施氮量V×N 0.08NS 2.39NS 3.32* 1.03NS 13.72** 0.04NS 11.21** 0.11NS 8.92**
年份×品种×施氮量Y×V×N 0.05NS 1.13NS 3.71* 0.34NS 15.21** 0.01NS 8.91** 0.04NS 17.12**

Fig. 3

Relationships between the plant N concentrations and aboveground biomass of dryland spring maize under the different precipitation patterns a: rainy at the ear stage; b: drought at the ear stage. Nc, Nmin, and Nmax are critical nitrogen concentration, minimum, and maximum of nitrogen concentration in spring maize."

Fig. 4

Validations of critical nitrogen dilution curve with independent data under different precipitation patterns in dryland spring maize a: rainy at the ear stage; b: drought at the ear stage."

Fig. 5

Dynamic changes of nitrogen nutrition index (NNI) under different precipitation patterns in dryland spring maize a: rainy at the ear stage; b: drought at the ear stage. Abbreviations are the same as those given in Fig. 2."

Fig. 6

Relationships between nitrogen nutrition index (NNI) and relative nitrogen uptake (RNupt) under different precipitation patterns in dryland spring maize a: rainy at the ear stage; b: drought at the ear stage. Abbreviations are the same as those given in Fig. 2. *** indicates significant at P ≤ 0.001."

Fig. 7

Relationships between nitrogen nutrition index (NNI) and relative aboveground dry biomass (RDW) under different precipitation patterns in dryland spring maize a: rainy at the ear stage; b: drought at the ear stage. Abbreviations are the same as those given in Fig. 2. ** indicates significant at P ≤ 0.01; *** indicates significant at P ≤ 0.001."

Fig. 8

Relationships between nitrogen nutrition index (NNI) and relative yield (RY) under different precipitation patterns in dryland spring maize a: rainy at the ear stage; b: drought at the ear stage."

[1] 山立, 邹宇锋. 我国旱区农业的地位和发展潜力及政策建议. 农业现代化研究, 2013,34:425-430.
Shan L, Zou Y F. Status and potential for development of China’s dryland agriculture and suggestions on its policy making. Res Agric Modern, 2013,34:425-430 (in Chinese with English abstract).
[2] Brve K R, Norman J M, Gower S T, Bundy L G. Methodological limitations and N budget differences among a restored tall grass prairie and maize agroecosystems. Agric Ecosyst Environ, 2003,97:181-198.
[3] Zheng H L, Liu Y C, Qin Y L, Chen Y, Fan M S. Establishing dynamic thresholds for potato nitrogen status diagnosis with the SPAD chlorophyll meter. J Integr Agric, 2015,14:190-195.
[4] Ren T, Peter C, Wang J G, Chen Q, Zhang F S. Root zone soil nitrogen management to maintain high tomato yields and minimum nitrogen losses to the environment. Sci Hortic, 2010,125:25-33.
[5] Hansen P M, Schjoerring J K. Reflectance measurement of canopy biomass and nitrogen status in wheat crops using normalized difference vegetation indices and partial least squares regression. Remote Sens Environ, 2003,86:542-553.
[6] 郭建华, 赵春江, 王秀, 陈立平. 作物氮素营养诊断方法的研究现状及进展. 中国土壤与肥料, 2008, (4):10-14.
Guo J H, Zhao C J, Wang X, Chen L P. Research advancement and status on crop nitrogen nutrition diagnosis. Soils Fert Sci China, 2008, (4):10-14 (in Chinese with English abstract).
[7] 马露露, 吕新, 张泽, 马革新, 海兴岩. 基于临界氮浓度的滴灌棉花氮素营养诊断模型研究. 农业机械学报, 2018,49(2):277-283.
Ma L L, Lyu X, Zhang Z, Ma G X, Hai X Y. Establishment of nitrogen nutrition diagnosis model for drip-irrigation cotton based on critical nitrogen concentration. Trans CSAM, 2018,49(2):277-283 (in Chinese with English abstract).
[8] 赵犇, 姚霞, 田永超, 刘晓军, 曹卫星, 朱艳. 基于临界氮浓度的小麦地上部氮亏缺模型. 应用生态学报, 2012,23:3141-3148.
Zhao B, Yao X, Tian Y C, Liu X J, Cao W X, Zhu Y. Accumulative nitrogen deficit models of wheat aboveground parts based critical nitrogen concentration. Chin J Appl Ecol, 2012,23:3141-3148 (in Chinese with English abstract).
[9] 刘秋霞, 任涛, 张亚伟, 廖世鹏, 李小坤, 丛日环, 鲁剑巍. 华中区域直播冬油菜临界氮浓度稀释曲线的建立与应用. 中国农业科学, 2019,52:2835-2844.
Liu Q X, Ren T, Zhang Y W, Liao S P, Li X K, Cong R H, Lu J W. Determination and application of a critical nitrogen dilution curve for direct-sowing winter oilseed rape in central China. Sci Agric Sin, 2019,52:2835-2844.
[10] Yao X, Atauikarim S T, Zhu Y, Tian Y C, Liu X J, Cao W X. Development of critical nitrogen dilution curve in rice based on leaf dry matter. Eur J Agron, 2014,55:20-28.
[11] 牟思维, 解君, 罗成, 刘铁宁, 杨宝平, 韩清芳, 刘晓雪. 关中地区大蒜临界氮浓度稀释曲线及验证. 农业工程学报, 2019,35(19):126-133.
Mou S W, Xie J, Luo C, Liu T N, Yang B P, Han Q F, Liu X X. Establishment and verification of critical nitrogen concentration dilution curve of garlic in Guanzhong plain. Trans CSAE, 2019,35(19):126-133 (in Chinese with English abstract).
[12] 李正鹏, 宋明丹, 冯浩. 关中地区玉米临界氮浓度稀释曲线的建立和验证. 农业工程学报, 2015,31(13):135-141.
Li Z P, Song M D, Feng H. Development and validation of critical nitrogen content for maize in Guanzhong area. Trans CSAE, 2015,31(13):135-141 (in Chinese with English abstract).
[13] 付江鹏, 贺正, 贾彪, 刘慧芳, 李振洲, 刘志. 滴灌玉米临界氮稀释曲线与氮素营养诊断研究. 作物学报, 2020,46:290-299.
Fu J P, He Z, Jia B, Liu H F, Li Z Z, Liu Z. Critical nitrogen dilution curve and nitrogen nutrition diagnosis of maize with drip irrigation. Acta Agron Sin, 2020,46:290-299 (in Chinese with English abstract).
[14] 安志超, 黄玉芳, 汪洋, 赵亚南, 岳松华, 师海斌, 叶优良. 不同氮效率夏玉米临界氮浓度稀释模型与氮营养诊断. 植物营养与肥料学报, 2019,25:123-133.
An Z C, Huang Y F, Wang Y, Zhao Y, Yue S H, Shi H B, Ye Y L. Critical nitrogen concentration dilution model and nitrogen nutrition diagnosis in summer maize with different nitrogen efficiencies. Plant Nut Fert Sci, 2019,25:123-133 (in Chinese with English abstract).
[15] 梁效贵, 张经廷, 周丽丽, 李旭辉, 周顺利. 华北地区夏玉米临界氮稀释曲线和氮营养指数研究. 作物学报, 2013,39:292-299.
Liang X G, Zhang J T, Zhou L L, Li X H, Zhou S L. Critical nitrogen dilution curve and nitrogen nutrition index for summer maize in North China Plain. Acta Agron Sin, 2013,39:292-299 (in Chinese with English abstract).
[16] Yue S C, Sun F L, Meng Q F, Zhao R F, Li F, Chen X P, Zhang F S, Cui Z L. Validation of a critical nitrogen curve for summer maize in the North China Plain. Pedosphere, 2014,24:76-83.
[17] Plenet D, Lemaire G. Relationships between dynamics of nitrogen uptake and dry matter accumulation in maize crops. Plant Soil, 1999,216:65-82.
[18] Herrmann A, Taube F. The range of the critical N dilution curve for maize can be extended until silage maturity. Agron J, 2004,96:1131-1138.
[19] Ziadi N, Brassard M, Bélanger G, Cambouris A N, Tremblay N, Nolin M C, Claessens A, Parent L E. Critical N curve and N nutrition index for corn in Eastern Canada. Agron J, 2008,100:271-276.
[20] Justes E, Mary B, Meynard J M, Machet J M, Thelier-Huche L. Determination of a critical nitrogen dilution curve for winter wheat crops. Ann Bot, 1994,74:397-407.
[21] Lemaire G, Van Oosterom E, Sheehy J, Jeuffroy M H, Massignam A, Rossato L. Is crop N demand more closely related to dry matter accumulation or leaf area expansion during vegetative growth. Field Crops Res, 2007,100:91-106.
[22] Gastal F, Lemaire G. N uptake and distribution in crops: an agronomical and ecophysiological perspective. J Exp Bot, 2002,53:789-799.
doi: 10.1093/jexbot/53.370.789 pmid: 11912222
[23] Willmott C J. Some comments on the evaluation of model performance. Bul Am Meteorol Soc, 1982,63:1309-1369.
[24] Yang J, Greenwood D J, Rowell D L, Wadsworth G A, Burns I G. Statistical methods for evaluating a crop nitrogen simulation model. Agric Syst, 2000,64:37-53.
[25] Jamieson P D, Porter J R, Wilson D R. A test of the computer simulation model ARCWHEAT1 on wheat crops grown in New Zealand. Field Crops Res, 1991,27:337-350.
doi: 10.1016/0378-4290(91)90040-3
[26] Liu J L, Zhan A, Bu L D, Zhu L, Luo S S, Chen X P, Cui Z L, Li S Q, Hill R L, Zhao Y. Understanding dry matter and nitrogen accumulation for high-yielding film-mulched maize. Agron J, 2014,106:390-396.
doi: 10.2134/agronj2013.0404
[27] Poommel B, Gallais A, Coque M, Quilleré I, Hirel B, Peioul J L, Andrieu B, Floriot M. Carbon and nitrogen allocation and grain filling in three maize hybrids differing in leaf senescence. Eur J Agron, 2006,24:203-211.
doi: 10.1016/j.eja.2005.10.001
[28] Maryam H, Farhan A, Kaveh Z. Effect of drought stress on some morphological, physiological and agronomic traits in various foliage corn hybrids. Am-Eurasian J Agric Environ Sci, 2012,12:890-896.
[29] 宁芳, 张元红, 温鹏飞, 王瑞, 王倩, 董朝阳, 贾广灿, 李军. 不同降水状况下旱地玉米生长与产量对施氮量的响应. 作物学报, 2019,45:777-791.
doi: 10.3724/SP.J.1006.2019.83055
Ning F, Zhang Y H, Wen P F, Wang Q, Dong Z Y, Jia G C, Li J. Responses of maize growth and yield to nitrogen application in dryland under different precipitation conditions. Acta Agron Sin, 2019,45:777-791 (in Chinese with English abstract).
doi: 10.3724/SP.J.1006.2019.83055
[1] GUO Xing-Yu, LIU Peng-Zhao, WANG Rui, WANG Xiao-Li, LI Jun. Response of winter wheat yield, nitrogen use efficiency and soil nitrogen balance to rainfall types and nitrogen application rate in dryland [J]. Acta Agronomica Sinica, 2022, 48(5): 1262-1272.
[2] ZHANG Jia-Kang, LI Fei, SHI Shu-De, YANG Hai-Bo. Construction and application of the critical nitrogen concentration dilution model of sugar beet in Inner Mongolia, China [J]. Acta Agronomica Sinica, 2022, 48(2): 488-496.
[3] GAO Zhen, LIANG Xiao-Gui, ZHANG Li, ZHAO Xue, DU Xiong, CUI Yan-Hong, ZHOU Shun-Li. Effects of irrigating at different growth stages on kernel number of spring maize in the North China Plain [J]. Acta Agronomica Sinica, 2021, 47(7): 1324-1331.
[4] ZHENG Ying-Xia, CHEN Du, WEI Peng-Cheng, LU Ping, YANG Jin-Yue, LUO Shang-Ke, YE Kai-Mei, SONG Bi. Effects of planting density on lodging resistance and grain yield of spring maize stalks in Guizhou province [J]. Acta Agronomica Sinica, 2021, 47(4): 738-751.
[5] ZHU Ya-Li, WANG Chen-Guang, YANG Mei, ZHENG Xue-Hui, ZHAO Cheng-Feng, ZHANG Ren-He. Response of grain filling and dehydration characteristics of kernels located in different ear positions in the different maturity maize hybrids to plant density [J]. Acta Agronomica Sinica, 2021, 47(3): 507-519.
[6] SU Wen-Nan, XIE Jun, HAN Juan, LIU Tie-Ning, HAN Qing-Fang. Construction of critical nitrogen dilution curve based on dry matter in diffe rent organs of summer maize and estimation of grain yield [J]. Acta Agronomica Sinica, 2021, 47(3): 530-545.
[7] LI Rui-Jie,TANG Hui-Hui,WANG Qing-Yan,XU Yan-Li,WANG Qi,LU Lin,YAN Peng,DONG Zhi-Qiang,ZHANG Feng-Lu. Effects of 5-aminolevulinic acid and ethephon compound on carbon balance of source-sink of spring maize in Northeast China [J]. Acta Agronomica Sinica, 2020, 46(7): 1063-1075.
[8] ZHANG Yu-Qin,YANG Heng-Shan,LI Cong-Feng,ZHAO Ming,LUO Fang,ZHANG Rui-Fu. Effects of strip-till with staggered planting on yield formation and shoot-root characteristics of spring maize in irrigation area of Xiliaohe plain [J]. Acta Agronomica Sinica, 2020, 46(6): 902-913.
[9] Wei BAI,Zhan-Xiang SUN,Li-Zhen ZHANG,Jia-Ming ZHENG,Liang-Shan FENG,Qian CAI,Wu-Yan XIANG,Chen FENG,Zhe ZHANG. Effects of plough layer construction on soil three phase rate and root morphology of spring maize in northeast China [J]. Acta Agronomica Sinica, 2020, 46(5): 759-771.
[10] DU Yu-Xiao, LI Xin-Ge, WANG Xue, LIU Xiao-Jun, TIAN Yong-Chao, ZHU Yan, CAO Wei-Xing, CAO Qiang. Nitrogen demand characteristics with different grain yield levels for wheat after rice [J]. Acta Agronomica Sinica, 2020, 46(11): 1780-1789.
[11] FU Jiang-Peng,HE Zheng,JIA Biao,LIU Hui-Fang,LI Zhen-Zhou,LIU Zhi. Critical nitrogen dilution curve and nitrogen nutrition diagnosis of maize with drip irrigation [J]. Acta Agronomica Sinica, 2020, 46(02): 290-299.
[12] Fang NING,Yuan-Hong ZHANG,Peng-Fei WEN,Rui WANG,Qian WANG,Zhao-Yang DONG,Guang-Can JIA,Jun LI. Responses of maize growth and yield to nitrogen application in dryland under different precipitation conditions [J]. Acta Agronomica Sinica, 2019, 45(5): 777-791.
[13] Hui-Hui TANG,Yan-Li XU,Qing-Yan WANG,Zheng-Bo MA,Guang-Yan LI,Hui DONG,Zhi-Qiang DONG. Increasing spring maize yield by basic application of PASP chelating nitrogen fertilizer in northeast China [J]. Acta Agronomica Sinica, 2019, 45(3): 431-442.
[14] Hai-Chao FAN,Wan-Rong GU,De-Guang YANG,Ju-Ping YU,Lin PIAO,Qian ZHANG,Li-Guo ZHANG,Xiu-Hong YANG,Shi WEI. Effect of Chemical Regulators on Physical and Chemical Properties and Lodging Resistance of Spring Maize Stem in Northeast China [J]. Acta Agronomica Sinica, 2018, 44(6): 909-919.
[15] BAI Wei, ZHANG Li-Zhen, PANG Huan-Cheng, SUN Zhan-Xiang, NIU Shi-Wei, CAI Qian,AN Jing-Wen. Effects of Straw Returning Combined with Nitrogen Fertilizer on Photosynthetic Performance and Yield of Spring Maize in Northeast China [J]. Acta Agron Sin, 2017, 43(12): 1845-1855.
Full text



No Suggested Reading articles found!