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Acta Agronomica Sinica ›› 2020, Vol. 46 ›› Issue (01): 117-130.doi: 10.3724/SP.J.1006.2020.92010

• TILLAGE & CULTIVATION·PHYSIOLOGY & BIOCHEMISTRY • Previous Articles     Next Articles

Effect of nitrogen application on yield and rice quality of mechanical transplanting high quality late rice

TANG Jian1,TANG Chuang1,GUO Bao-Wei1,*(),ZHANG Cheng-Xin1,ZHANG Zhen-Zhen1,WANG Ke1,ZHANG Hong-Cheng1,CHEN Heng2,SUN Ming-Zhu3   

  1. 1 Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, Jiangsu, China
    2 Bureau of Agriculture of Shanggao County of Jiangxi Province, Shanggao 336400, Jiangxi, China
    3 Jiangxi Agricultural Technology Extension Station, Nanchang 330046, Jiangxi, China
  • Received:2019-03-05 Accepted:2019-08-09 Online:2020-01-12 Published:2019-09-01
  • Contact: Bao-Wei GUO E-mail:gbwyx@126.com
  • Supported by:
    This study was supported by the Grants from the National Key Research Program(2016YFD0300507);National Natural Science Foundation of China(31601246);National Modern Agricultural Industry Technology System Construction Special(CARS-01-27);Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions

Abstract:

The experiment was conducted by using four high quality late rice varieties, including Taiyou 398, Huanghuazhan, Tianyouhuazhan, and Meixiangxinzhan under four nitrogen treatments of 0, 135, 180, and 255 kg hm -2 to select the optimum nitrogen application rate for the coordination of high quality and high yield. The appropriate increase of nitrogen application improved the yield of high quality rice, which reached maximum under the nitrogen treatment of 180 kg hm -2. When the nitrogen application was 180 kg hm -2, the indicators such as the brown rice rate, milled rice rate and head milled rice rate for all varieties reached maximum except for the head milled rice rate of Huanghuazhan. As more nitrogen was gradually applied, there were growing length-width ratio, protein content and gel consistency of double-season high-quality late rice while in contrast reduction in chalky grain percentage, chalkiness degree and amylose content, which also brought about a steady drop in peak viscosity, trough viscosity, breakdown, final viscosity while a rise in setback and pasting temperature. To sum up, the appropriate increase of nitrogen application can improve the processing quality, appearance quality, cooking and nutritional quality while deteriorate the RVA characteristics. The nitrogen application of 180 kg hm -2 facilitates a better coordination between quality and yield in high quality double-season late rice under mechanical transplanting.

Key words: mechanical transplanting, high quality late rice, nitrogen application, yield, rice quality

Table 1

Yield and composition of high quality late rice under different nitrogen application rates"

品种
Cultivar
处理Treatment 穗数
Panicle
(×104 hm-2)
每穗粒数
Spikelets per
panicle
总颖花量
Total number
of spikelets
(×104 hm-2)
结实率
Seed-setting rate (%)
千粒重
1000-kernel
weight
(g)
理论产量
Theoretical yield
(kg hm-2)
实际产量
Actual
yield
(kg hm-2)
2017
美香新占
Meixiang- xinzhan
N0 295.50 Bb 127.39 Bc 37643.45 Cc 83.43 Aa 20.35 Aa 6391.11 Cc 6218.51 Cc
N1 347.82 ABa 146.36 ABb 50907.50 Bb 77.79 ABb 20.05 Aab 7939.99 Bb 7497.38 Bb
N2 354.63 Aa 157.26 Aa 55768.68 Aa 77.74 ABb 19.25 Ab 8345.75 Aa 8204.39 Aa
N3 357.92 Aa 156.04 Aa 55849.66 Aa 77.15 Bb 19.17 Aab 8186.72 ABa 8096.84 ABa
泰优398
Taiyou 398
N0 304.88 Cc 117.36 Bb 35780.99 Cc 82.21 Aa 22.57 Aa 6639.09 Bc 6495.88 Bc
N1 341.09 Bb 129.04 Aa 44014.31 Bb 79.28 ABab 22.41 Aa 7819.87 Ab 7342.58 ABb
N2 367.41 ABa 131.02 Aa 48137.55 Aa 76.83 ABbc 22.35 Aa 8265.94 Aa 7928.13 Aa
N3 377.66 Aa 129.25 Aa 48812.10 Aa 75.02 Bc 22.30 Aa 8166.00 Aa 7733.12 Aa
天优华占
Tianyouhua-
zhan
N0 269.72 Cc 111.37 Cc 30039.25 Cc 90.81 Aa 23.57 Aa 6456.85 Bc 6203.33 Bc
N1 285.15 BCb 133.18 Bb 37975.94 Bb 88.43 Aab 23.40 Aa 7858.22 ABb 7565.08 Ab
N2 292.93 Bb 154.12 Aa 45146.24 Aa 86.38 ABb 23.30 Aa 9086.38 Aa 8608.62 Aa
N3 315.88 Aa 150.32 Aa 47482.38 Aa 82.14 Bc 23.19 Aa 9005.57 Aa 8517.32 Aa
黄华占
Huanghuazhan
N0 285.21 Bb 105.05 Cc 29961.58 Cc 92.04 Aa 22.11 Aa 6097.19 Bc 5941.71 Bc
N1 334.41 ABa 112.96 Bb 37775.11 Bb 91.45 ABa 21.87 Aa 7555.06 Ab 6987.72 ABb
N2 337.41 ABa 121.92 Aa 41137.03 Aa 91.09 ABa 21.75 Aa 8112.63 Aa 7948.39 Aa
N3 354.47 Aa 119.68 Aa 42423.47 Aa 88.09 Bb 21.68 Aa 8027.25 Aa 7870.37 Aa
2018
美香新占
Meixiang- xinzhan
N0 304.77 Bc 103.30 Bb 31482.50 Bc 86.17 Aa 21.10 Aa 5724.27 Bb 5602.80 Bc
N1 317.08 ABbc 144.50 Aa 45818.28 Ab 84.16 Aab 20.12 Aab 7750.88 Aa 7326.74 Ab
N2 326.32 ABb 148.54 Aa 48470.61 Aab 83.79 Ab 19.80 Ab 8041.17 Aa 7757.72 Aa
N3 354.02 Aa 142.97 Aa 50615.57 Aa 83.37 Ab 19.75 Ab 7912.05 Aa 7634.58 Aab
泰优398
Taiyou 398
N0 273.98 Bc 97.22 Bc 26637.24 Bc 87.29 Aa 24.25 Aa 5638.66 Cc 5910.65 Bc
N1 338.63 Aa 113.77 Ab 38526.95 Ab 85.69 Aab 24.20 Aa 7989.63 Bb 7449.88 Ab
N2 347.87 Aab 121.08 Aa 42120.79 Aa 85.14 Ab 23.90 Aa 8571.00 Aa 8127.14 Aa
N3 354.02 Ab 117.75 Aab 41686.22 Aab 84.74 Ab 23.85 Aa 8425.41 ABa 7942.43 Aa
天优华占
Tianyouhuazhan
N0 283.77 Ac 97.00 Cc 27525.47 Cc 85.43 Aa 24.80 Aa 5831.91 Cc 5610.65 Bc
N1 306.42 Ab 131.32 Bb 40239.12 Bb 83.09 ABab 24.60 Aa 8225.20 Bb 7816.15 Ab
N2 324.58 Aa 145.83 Aa 47334.81 Aa 80.51 ABbc 24.45 Aa 9280.08 Aa 8831.26 Aa
N3 335.54 Aa 141.50 ABa 47478.53 Aa 79.36 Bc 24.40 Aa 9156.49 Aa 8646.55 Aa
黄华占
Huanghuazhan
N0 286.53 Ac 96.65 Bb 27693.35 Cc 90.65 Aa 22.80 Aa 5723.56 Bc 5699.08 Cc
N1 318.18 Ab 119.71 Aa 38089.35 Bb 89.22 Aab 22.75 Aa 7731.50 Ab 7345.75 Bb
N2 338.32 Aa 123.34 Aa 41728.23 Aa 88.49 Aab 22.65 Aa 8363.81 Aa 8180.86 Aa
N3 341.40 Aa 120.93 Aa 41284.46 Aa 87.92 Ab 22.60 Aa 8203.12 Aa 7996.15 ABa

Table 2

Processing quality of high quality late rice under different nitrogen application rates (%)"

品种
Cultivar
处理
Treatment
2017 2018
糙米率
BR
精米率
MR
整精米率
HMR
糙米率
BR
精米率
MR
整精米率
HMR
美香新占
Meixiangxinzhan
N0 78.41 Aa 68.67 Ab 58.94 Ab 77.01 Ab 70.71 Ab 53.58 Bb
N1 78.67 Aa 69.48 Ab 59.72 Aab 80.98 Aa 73.60 Aa 55.28 ABb
N2 79.30 Aa 70.74 Aa 62.25 Aa 81.20 Aa 73.88 Aa 58.02 Aa
N3 78.82 Aa 70.21 Aab 59.51 Aab 81.10 Aa 69.96 Ab 54.87 ABb
泰优398
Taiyou 398
N0 79.70 Ab 66.56 Ab 53.58 Abc 78.29 Ab 63.58 Ab 50.99 Ab
N1 80.63 Aab 69.17 Aab 55.16 Aab 79.68 Aab 67.91 Aab 53.97 Aab
N2 81.98 Aa 70.12 Aa 57.07 Aa 81.74 Aa 70.23 Aa 57.75 Aa
N3 81.00 Aab 69.90 Aab 52.33 Ac 81.81 Aa 69.68 Aa 52.19 Aab
天优华占
Tianyouhuazhan
N0 80.10 Ab 70.70 Aa 63.10 Bc 77.93 Ac 68.99 Ab 60.85 Bc
N1 80.14 Ab 71.22 Aa 65.89 ABb 81.08 Aab 70.25 Aab 64.05 ABb
N2 82.71 Aa 71.61 Aa 68.72 Aa 82.31 Aa 72.98 Aa 67.78 Aa
N3 81.51 Aab 71.29 Aa 61.67 Bc 79.72 Abc 71.89 Aa 59.54 Bc
黄华占
Huanghuazhan
N0 81.12 Aa 69.46 Ab 45.15 Bc 79.77 Aa 68.36 Ab 45.56 Cc
N1 81.24 Aa 70.00 Aab 48.99 ABbc 80.56 Aa 68.97 Ab 48.14 BCb
N2 82.51 Aa 70.63 Aa 53.11 Aab 80.68 Aa 70.13 Aa 52.32 ABa
N3 82.01 Aa 69.21 Ab 54.13 Aa 79.44 Aa 68.87 Ab 54.67 Aa

Table 3

Appearance quality of high quality late rice under different nitrogen application rates"

品种
Cultivar
处理
Treatment
2017 2018
粒长
KL (mm)
长宽比
L/W
垩白粒率
CR (%)
垩白度
CD (%)
粒长
KL (mm)
长宽比
L/W
垩白粒率
CR (%)
垩白度
CD (%)
美香新占
Meixiang xinzhan
N0 6.07 Aa 3.12 Aa 13.90 Aa 2.95 Aa 6.05 Aa 3.18 Aa 18.00 Aa 5.17 Aa
N1 6.12 Aa 3.16 Aa 12.94 ABa 2.63 Aa 6.30 Aa 3.33 Aa 15.04 Bb 3.64 Bb
N2 6.15 Aa 3.17 Aa 10.98 BCb 2.45 ABb 6.35 Aa 3.35 Aa 13.12 Cc 3.17 Bc
N3 6.28 Aa 3.23 Aa 9.90 Cb 2.30 Bb 6.42 Aa 3.36 Aa 11.89 Cd 2.59 Cd
泰优398
Taiyou 398
N0 5.91 Aa 3.00 Aa 18.94 Aa 3.91 Aa 6.23 Aa 3.33 Ab 18.62 Aa 5.59 Aa
N1 5.99 Aa 3.02 Aa 17.18 Aab 2.91 Bb 6.59 Aa 3.57 Aab 17.41 Aa 4.70 Bb
N2 6.06 Aa 3.05 Aa 13.90 Bc 2.65 Bb 6.62 Aa 3.59 Aab 15.68 Ab 3.76 Cc
N3 6.13 Aa 3.09 Aa 10.29 Cd 2.15 Bb 6.69 Aa 3.65 Aa 11.57 Ac 2.55 Dd
天优华占
Tianyouhuazhan
N0 6.15 Aa 3.27 Ab 21.05 Aa 6.14 Aa 5.73 Bb 3.02 Aa 23.76 Aa 11.58 Aa
N1 6.19 Aa 3.31 Aab 18.73 ABb 5.41 ABab 5.93 Bb 3.16 Aa 19.77 Bb 9.21 Bb
N2 6.23 Aa 3.38 Aab 17.25 ABbc 4.95 Bb 6.56 Aa 3.19 Aa 15.75 Cc 6.56 Cc
N3 6.33 Aa 3.45 Aa 16.21 Bc 4.20 Bb 6.75 Aa 3.24 Aa 15.23 Cc 6.54 Cc
黄华占
Huanghuazhan
N0 6.17 Aa 3.02 Ab 18.35 Aa 7.47 Aa 6.04 Aa 3.04 Aa 18.06 Aa 5.88 Aa
N1 6.22 Aa 3.06 Aab 17.71 Aa 6.70 ABa 6.05 Aa 3.11 Aa 14.61 Bb 4.43 Bb
N2 6.29 Aa 3.18 Aab 14.24 Ab 5.41 Bb 6.20 Aa 3.20 Aa 10.36 Cc 2.85 Cc
N3 6.37 Aa 3.28 Aa 7.43 Bc 4.97 Bb 6.21 Aa 3.21 Aa 9.96 Cc 2.72 Cc

Table 4

Cooking and nutritional quality of high quality late rice under different nitrogen application rates"

品种
Cultivar
处理
Treatment
2017 2018
直链淀粉含量
AC (%)
胶稠度
GC (mm)
蛋白质含量
PC (%)
直链淀粉含量
AC (%)
胶稠度
GC (mm)
蛋白质含量
PC (%)
美香新占 N0 19.34 Aa 62.0 Bc 6.10 Bc 17.95 Aa 63.2 Cc 6.5 Bc
Meixiang xinzhan N1 18.05 ABb 68.5 ABb 7.90 Ab 17.32 Aab 69.5 Bb 7.8 Ab
N2 17.52 Bbc 76.5 Aa 7.95 Ab 16.19 ABbc 75.9 Aa 8.5 Aa
N3 16.90 Bc 77.5 Aa 8.80 Aa 15.94 Bc 78.3 Aa 8.9 Aa
泰优398 N0 16.46 Aa 64.5 Bc 6.35 Dd 15.53 Aa 65.9 Ac 6.6 Cd
Taiyou 398 N1 15.74 Aab 68.0 ABbc 8.05 Cc 13.88 Bb 68.6 Abc 8.2 Bc
N2 15.26 Ab 69.5 ABab 8.70 Bb 13.57 Bbc 70.9 Aab 9.3 ABb
N3 15.23 Ab 73.0 Aa 9.70 Aa 12.85 Bc 73.5 Aa 10.1 Aa
天优华占 N0 23.78 Aa 65.8 Ab 7.10 Ab 22.51 Aa 68.8 Ab 6.7 Bc
Tianyouhuazhan N1 22.51 ABa 66.5 Ab 7.25 Aab 18.93 Bb 71.5 Ab 7.5 ABb
N2 19.53 BCb 75.8 Aa 7.35 Aab 18.26 Bbc 78.3 Aa 8.3 Aa
N3 19.01 Cb 76.0 Aa 7.70 Aa 17.68 Bc 79.2 Aa 8.8 Aa
黄华占 N0 17.92 Aa 49.5 Bc 6.35 Cc 16.11 Aa 53.6 Cc 7.4 Cc
Huanghuazhan N1 15.26 Bb 56.0 ABb 8.00 Bb 14.02 Bb 60.5 Bb 8.1 BCb
N2 13.71 Bc 58.0 Ab 8.40 ABb 12.36 Bbc 62.6 ABb 8.7 ABb
N3 13.41 Bbc 62.0 Aa 9.20 Aa 11.47 Bc 66.1 Aa 9.6 Aa

Table 5

RVA profile characteristics of high quality late rice under different nitrogen application rates (2018) "

品种
Cultivar
处理
Treatment
峰值黏度
Peak viscosity
(cP)
热浆黏度
Trough viscosity
(cP)
崩解值
Breakdown
(cP)
最终黏度
Final viscosity
(cP)
消减值
Setback
(cP)
糊化温度
Pasting temperature (℃)
美香新占 N0 3073.0 Aa 1777.5 Aa 1295.5 Aa 3002.5 Aa -70.5 Dd 75.13 Bb
Meixiang xinzhan N1 2860.0 ABb 1691.5 ABab 1168.5 ABb 2865.0 ABb 5.0 Cc 75.70 ABb
N2 2727.0 Bbc 1676.5 ABb 1050.5 Bc 2749.0 BCc 22.0 Bb 76.65 ABb
N3 2644.5 Bc 1608.5 Bb 1036.0 Bc 2694.0 Cc 49.5 Aa 78.23 Aa
泰优398 N0 3322.0 Aa 2036.0 Aa 1286.0 Aa 3134.5 Aa -187.5 Dd 75.15 Ab
Taiyou 398 N1 3025.0 ABb 1958.0 ABa 1067.0 Bb 2946.5 ABb -78.5 Cc 75.48 Ab
N2 2794.0 ABbc 1792.5 BCb 1001.5 BCc 2833.5 Bbc 39.5 Bb 76.35 Aab
N3 2641.0 Bc 1657.0 Cc 984.0 Cc 2745.0 Bc 104.0 Aa 77.33 Aa
天优华占 N0 2941.5 Aa 1839.0 Aa 1102.5 Aa 3093.5 Aa 152.0 Cd 76.75 Ab
Tianyouhuazhan N1 2862.0 ABa 1838.0 Aa 1024.0 ABb 3022.5 Aab 160.5 Cc 77.13 Ab
N2 2722.5 ABb 1782.0 Ab 940.5 Bc 2920.5 Ab 198.0 Bb 78.58 Aa
N3 2668.0 Bb 1728.50 Ab 939.5 Bc 2896.5 Ab 228.5 Aa 78.78 Aa
黄华占 N0 3075.5 Aa 1835.0 Aa 1240.5 Aa 2923.5 Aa -152.0 Dd 72.50 Bb
Huanghuazhan N1 2895.5 ABb 1759.5 Aab 1136.0 ABb 2805.0 ABb -90.5 Cc 73.65 ABb
N2 2785.0 Bbc 1696.0 Ab 1089.0 Bbc 2747.5 Bb -37.5 Bb 74.15 ABab
N3 2698.0 Bc 1638.0 Ab 1060.0 Bc 2740.5 Bb 42.5 Aa 75.63 Aa

Table 6

Variance analysis of yield and components of high quality late rice under different nitrogen application rates"

变异来源
Source of variation
年份
Y
品种
C
氮肥用量
N
年份×品种
Y×C
年份×氮肥
用量
Y×N
品种×氮肥用量
C×N
年份×品种×
氮肥用量
Y×C×N
自由度 df 1 3 3 3 3 9 9
穗数Panicle 5.901* 77.14** 207.66** 24.78** 4.36* 3.82** 4.02**
每穗粒数Spikelets per panicle 152.87** 296.40** 408.01** 21.06** 17.81** 19.28** 1.62
总颖花量Total number of spikelets 210.24** 321.75** 1093.84** 68.89** 8.42** 11.22** 1.54
结实率Filled-grain percentage 9.93** 57.27** 18.05** 33.18** 1.54 0.92 0.35
千粒重1000-kernel weight 61.28** 201.49** 7.07** 4.97** 0.07 1.41 0.31
产量Yield 4.37* 32.19** 713.21** 9.56** 14.47** 7.51** 0.95
F0.05 4.16 2.91 2.91 2.91 2.91 2.19 2.19
F0.01 7.53 4.48 4.48 4.48 4.48 3.04 3.04

Table 7

Variance analysis of rice quality and starch RVA profile characteristics of high quality late rice under different nitrogen application rates"

变异来源
Source of variation
年份
Y
品种
C
氮肥用量
N
年份×品种
Y×C
年份×氮肥用量
Y×N
品种×氮肥用量
C×N
年份×品种×
氮肥用量
Y×C×N
自由度 df 1 3 3 3 3 9 9
糙米率 BR 1.85 4.09* 10.73** 5.12** 1.77 0.58 0.83
精米率 MR 0.46 7.96** 11.52** 4.17* 0.58 2.24* 1.14
整精米率 HMR 41.85** 409.36** 65.81** 11.92** 0.76 15.25** 0.54
长宽比 L/W 33.99** 11.76** 18.89** 61.26** 1.90 0.39 0.53
垩白粒率 CR 2011.08** 2241.82** 1185.19** 3517.08** 30.86** 37.38** 26.37**
垩白度 CD 616.49** 7547.28** 2116.79** 8743.70** 154.42** 52.60** 99.76**
直链淀粉含量 AC 385.15** 1162.91** 326.03** 8.88** 5.38** 20.13** 6.28**
蛋白质含量 PC 57.15** 439.02** 277.98** 8.77** 0.32 9.84** 0.37
胶稠度 GC 69.15** 62.814** 515.17** 3.46* 5.72** 16.93** 5.73**
峰值黏度 PKV 10.43** 18.63** 113.98** 11.16** 2.13 6.07** 0.50
热浆黏度 THV 46.93** 93.56** 33.68** 38.51** 17.88** 14.35** 1.86
崩解值 BKD 486.79** 85.67** 516.85** 83.93** 15.58** 5.28** 8.78**
最终黏度 FLV 19.92** 78.08** 18.96** 28.89** 8.84** 3.79** 0.88
消减值 STB 769.98** 30348.16** 16690.88** 7333.67** 1416.93** 409.35** 359.09**
糊化温度 PAT 58.79** 89.87** 3.75* 52.58** 0.53 0.10 0.14
F0.05 4.16 2.91 2.91 2.91 2.91 2.19 2.19
F0.01 7.53 4.48 4.48 4.48 4.48 3.04 3.04

Table 8

Correlation coefficients between various indexes of high quality late rice cultivars under different nitrogen application rates"

指标
Index
糙米率
BR
精米率
MR
整精米率
HMR
垩白粒率
CR
垩白度
CD
直链淀含量
AC
胶稠度
GC
蛋白质含量
PC
峰值黏度PKV 热浆黏度THV 崩解值BKD 最终黏度
FLV
消减值STB
精米率 MR 0.485
整精米率 HMR 0.178 0.576*
垩白粒率 CR -0.258 -0.174 0.180
垩白度 CD -0.134 -0.048 0.228 0.819**
直链淀粉含量AC -0.360 0.259 0.626** 0.691** 0.694**
蛋白质含量PC 0.238 0.462 0.720** -0.248 -0.320 0.216
胶稠度 GC 0.614* 0.287 -0.050 -0.783** -0.620* -0.630** 0.387
峰值黏度PKV -0.511* -0.588* -0.168 0.763** 0.432 0.309 -0.404 -0.836**
热浆黏度THV -0.281 -0.316 0.360 0.691** 0.344 0.464 0.201 -0.600* 0.785**
崩解值BKD -0.544* -0.604* -0.574* 0.566* 0.395 0.093 -0.812** -0.741** 0.808** 0.274
最终黏度FLV -0.384 -0.019 0.636** 0.649** 0.448 0.773** 0.382 -0.635** 0.568* 0.869** 0.078
消减值STB 0.200 0.651** 0.823** -0.225 -0.047 0.416 0.841** 0.321 -0.575* -0.030 -0.843** 0.347
糊化温度PAT -0.257 0.467 0.651** -0.138 -0.259 0.487 0.768** -0.025 -0.226 0.163 -0.496 0.502* 0.755**

Table 9

Temperature and light factors during filling stage "

品种
Cultivar
处理
Treatment
日平均温度
Daily mean
temperature (℃)
日最高温度
Daily maximum
temperature (℃)
日最低温度
Daily minimum
temperature (℃)
日平均温差
Daily mean
temperature
difference (℃)
日平均光照时数
Daily mean
illumination
hours (h)
2017
美香新占
Meixiangxinzhan
N0 20.34 23.97 16.81 7.16 7.14
N1 20.41 23.18 16.24 6.94 6.87
N2 19.52 22.98 16.11 6.87 6.54
N3 19.14 22.78 15.98 6.80 6.17
泰优398
Taiyou 398
N0 23.87 25.49 19.68 5.81 6.87
N1 23.24 25.12 19.37 5.75 6.69
N2 22.17 24.41 19.25 5.16 6.26
N3 19.98 24.19 19.07 5.12 5.76
天优华占
Tianyouhuazhan
N0 22.56 25.17 18.23 6.94 6.58
N1 21.49 24.98 18.25 6.73 6.12
N2 21.05 24.52 17.92 6.60 5.56
N3 19.88 23.91 17.24 6.67 5.24
黄华占
Huanghuazhan
N0 22.59 25.74 17.86 7.88 6.97
N1 22.11 25.24 17.53 7.71 6.68
N2 21.47 24.56 16.97 7.59 6.25
N3 20.41 23.87 16.54 7.33 6.16
2018
美香新占
Meixiangxinzhan
N0 21.02 25.06 17.03 8.03 7.05
N1 20.56 24.33 16.54 7.79 6.98
N2 19.61 23.57 15.69 7.88 6.57
N3 19.41 23.12 15.40 7.72 6.21
泰优398
Taiyou 398
N0 24.90 26.57 21.28 5.29 6.66
N1 23.45 25.98 20.95 5.03 6.25
N2 22.35 24.56 20.41 4.15 5.78
N3 22.04 24.22 19.88 4.34 5.52
天优华占
Tianyouhuazhan
N0 22.76 26.32 19.23 7.09 6.15
N1 22.46 26.12 18.84 7.28 5.57
N2 21.15 25.74 18.35 7.39 5.68
N3 20.94 25.16 18.02 7.14 5.21
黄华占
Huanghuazhan
N0 22.75 26.63 18.91 7.72 6.72
N1 22.13 25.93 18.46 7.47 6.34
N2 21.58 25.12 18.17 6.95 5.97
N3 20.97 24.95 17.76 7.19 6.04

Table 10

Correlation coefficients between rice quality characters and temperature and light factors during grain-filling period"

指标
Index
日平均温度
Daily mean
temperature (°C)
日最高温度
Daily maximum
temperature (°C)
日最低温度
Daily minimum
temperature (°C)
日平均温差
Daily mean
temperature
difference (°C)
日平均光照时数
Daily mean
illumination
hours (h)
糙米率 BR -0.328 -0.451 -0.120 -0.207 -0.473
精米率 MR -0.712** -0.470 -0.593* 0.406 -0.116
整精米率 HMR -0.246 -0.075 -0.119 0.097 -0.505*
粒长 KL -0.202 -0.458 0.095 -0.498* -0.449
长宽比 L/W 0.031 -0.493 0.277 -0.768** -0.202
垩白率 CR 0.554* 0.668** 0.397 0.016 0.178
垩白度 CD 0.398 0.664** 0.280 0.167 -0.159
直链淀粉含量 AC -0.056 0.229 -0.200 0.451 0.099
蛋白质含量 PC -0.457 -0.541* -0.259 -0.095 -0.540*
胶稠度 GC -0.400 -0.596* -0.096 -0.357 -0.588*
峰值黏度 PKV 0.737** 0.685** 0.486 -0.089 0.614*
热浆黏度THV 0.869** 0.793** 0.749** -0.350 0.169
崩解值 BKD 0.353 0.343 0.055 0.206 0.861**
最终黏度 FLV 0.680** 0.758** 0.506* -0.057 0.187
消减值 STB -0.401 -0.236 -0.212 0.077 -0.747**
糊化温度 PAT -0.394 -0.422 -0.202 -0.075 -0.609*
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