密植条件下玉米品种混播对夏玉米光合性能及产量的影响

doi:10.3724/SP.J.1006.2018.00920

Abstract

Abstract:

During the 2016 and 2017 growing seasons in Shandong, a province in the North China Plain, using Zhengdan 958 and Denghai 605 for five treatments, including M (random sowing after mixing in the same proportion), 1:1 (raw ratio of ZD958 to DH605 is 1:1), 2:2 (raw ratio of ZD958 to DH605 is 2:2), and two monoculture treatments (SDH605 and SDH605). This experiment was conducted to explore the effects of mixed-cropping on grain yield, amount of dry matter of groups, net photosynthetic rate, anti-oxidative metabolism, canopy structure of summer maize under a density of 82 500 plants ha ^-1. The two-year results showed that mixed-cropping significantly improved canopy light transmittance, leaf area index, chlorophyll content, net photosynthetic rate and dry matter accumulation. Superoxide dismutase (SOD), peroxidase (POD) activities and soluble protein content increased significantly, but the content of MDA decreased under mixed-cropping. The grain yield of summer maize increased significantly under mixed-cropping, due to the increase in grains per spike and 1000-kernel weight. Compared with SZD958 and SDH605, the two-year average grain yields of M, 1:1, 2:2 increased by 11.47%, 8.70%, 8.48% and 9.30%, 6.42%, 6.20%, respectively. There were no significant difference among M, 1:1 and 2:2 treatments. Mixed-cropping formed high-efficiency canopy structure, created better aeration and transmittance conditions, delayed leaf senescence, slowed down the decrease of leaf area index and chlorophyll content after anthesis, maintained higher net photosynthetic rate and increased dry matter accumulation, eventually resulted in the higher grain yield of summer maize. It is concluded that mixed-cropping with reasonable varieties can significantly increase the yield of close planting summer maize, which is one of the optional cultivation patterns to increase maize yield in the Yellow-Huaihe-Haihe Rivers Plain．

Key words: summer maize, high plant density, mixed-cropping, photosynthetic characteristics, grain yield

Dan-Dan HU,Ji-Wang ZHANG,Peng LIU,Bin ZHAO,Shu-Ting DONG. Effects of Mixed-cropping with Different Varieties on Photosynthetic Characteristics and Yield of Summer Maize under Close Planting Condition[J].Acta Agronomica Sinica, 2018, 44(6): 920-930.

Figures/Tables 9

Table 1

Table 2

Table 3

Effects of mixed-cropping on dry matter accumulation of summer maize at different growth stages"

年份 Year	生育时期 Growth stage	处理 Treatment	干物质积累量 Dry matter accumulation (kg hm^-2)
年份 Year	生育时期 Growth stage	处理 Treatment	茎秆 Stalk	叶片 Leaf	雄穗 Tassel	苞叶 Husk	穗轴 Cob	籽粒 Grain	雌穗 Ear	植株 Plant
2016	VT	SZD958	4692.6 ab	2693.4 bc	370.2 abc	924.3 bc			518.9 c	9199.4 c
		SDH605	4605.7 b	2583.4 c	373.2 ab	860.2 c			452.7 d	8875.1 d
		M	4958.5 a	2896.0 a	317.1 bc	1026.9 b			608.9 a	9807.3 a
		1:1ZD958	4823.8 ab	2792.6 ab	279.7 c	860.5 c			481.0 d	9237.5 c
		1:1DH605	4791.3 ab	2784.9 ab	414.7 a	865.4 c			521.7 c	9378.1 bc
		2:2ZD958	4911.2 a	2700.5 bc	382.3 ab	1199.6 a			527.5 c	9720.9 ab
		2:2DH605	4840.8 ab	2785.2 ab	329.2 abc	990.6 bc			560.5 b	9506.2 abc
	R6	SZD958	4149.8 b	2425.5 c	236.5 b	825.5 ab	1672.0 ab	13684.0 b		23020.3 c
		SDH605	4224.0 ab	2579.5 bc	184.3 cd	891.0 ab	1556.5 bc	13593.3 b		23028.5 c
		M	4237.8 ab	2841.0 a	209.0 c	814.0 abc	1452.0 cd	14176.3 a		23765.5 a
		1:1ZD958	4372.5 a	2601.5 bc	189.8 cd	706.8 d	1383.3 d	14014.0 a		23267.8 bc
		1:1DH605	4273.5 ab	2884.8 a	178.8 d	761.8 cd	1793.0 a	14041.5 a		23850.8 a
		2:2ZD958	4317.5 ab	2656.5 b	275.0 a	836.0 abc	1553.8 bc	14024.0 a		23580.3 ab
		2:2DH605	4265.3 ab	2511.5 b	242.0 b	805.8 bc	1490.5 cd	14179.0 a		23694.0 a
	年份 Year	生育时期 Growth stage	处理 Treatment	干物质积累量 Dry matter accumulation (kg hm^-2)
茎秆 Stalk	年份 Year	生育时期 Growth stage	处理 Treatment	叶片 Leaf	雄穗 Tassel	苞叶 Husk	穗轴 Cob	籽粒 Grain	雌穗 Ear	植株 Plant
2017	VT	SZD958	4712.4 cd	2677.7 b	308.0 c	779.9 bc			138.9 d	8616.9 c
		SDH605	4681.3 d	2681.3 b	188.9 d	867.9 ab			204.3 c	8706.2 c
		M	5335.3 a	2907.0 a	283.3 c	931.7 a			221.9 bc	9679.2 a
		1:1ZD958	5272.0 ab	2853.7 ab	440.0 a	746.9 c			227.2 bc	9506.8 ab
		1:1DH605	5253.1 ab	2930.1 a	292.1 c	839.0 abc			131.5 d	9445.7 ab
		2:2ZD958	5006.4 bc	2949.4a	298.7 c	852.0 ab			262.1 ab	9368.4 b
		2:2DH605	5285.8 ab	2917.2 a	360.0 b	864.1 ab			295.6 a	9667.6 a
	R6	SZD958	4206.7 b	2708.8 de	254.4 a	597.3 bc	1540.0 a	13016.3 c		22323.4 c
		SDH605	4192.7 b	2526.7 e	121.6 c	544.5 c	1497.1 ab	13210.5 c		22093.0 c
		M	4274.6 a	2847.6 abc	127.6 c	567.1 bc	1347.0 b	14466.4 a		23851.6 a
		1:1ZD958	4426.1 ab	2930.7 a	193.3 b	617.9 abc	1314.2 b	14326.1 ab		23808.4 ab
		1:1DH605	4502.0 a	2571.5 cd	148.8 c	517.0 c	1572.5 a	14034.1 ab		23345.9 b
		2:2ZD958	4496.0 ab	2912.3 ab	277.2 a	727.1 a	1477.9 ab	13938.1 b		23607.1 ab
		2:2DH605	4424.8 ab	2771.7 bc	134.5 c	665.8 ab	1465.5 ab	13902.9 b		23365.1 b

Table 3

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Table 4

Table 5

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品种 Variety	生育时期 Growth stage (d)	株高 Plant height (cm)	株型 Plant type
郑单958 Zhengdan 958	110	260	紧凑, 上部叶片宽而大Compact, with wide and large upper leaves
登海605 Denghai 605	107	250	紧凑, 上部叶片窄而尖Compact, with narrow and sharpe upper leaves

年份 Year	处理 Treatment	穗数 Ear number (ears hm^-2)	穗粒数 Grains per ear	千粒重 1000-kernel weight (g)	产量 Yield (kg hm^-2)
2016	SZD958	78281.1 a	475.8 cd	356.1 b	10115.1 c
	SDH605	78455.6 a	470.3 d	351.0 b	10420.7 bc
	M	79850.6 a	513.9 a	371.8 a	11522.3 a
	1:1ZD958	79037.5 a	505.2 a	354.9 b	11159.6 a
	1:1DH605	80033.3 a	483.3 bc	366.4 a	11159.6 a
	2:2ZD958	79842.3 a	489.3 b	366.3 a	11049.5 ab
	2:2DH605	78693.8 a	484.4 bc	372.4 a	11049.5 ab
2017	SZD958	78953.3 a	462.5 c	343.5 e	10850.2 b
	SDH605	79314.2 a	464.8 c	363.0 c	11064.8 b
	M	79279.2 a	484.8 a	372.3 b	11928.5 a
	1:1ZD958	79359.2 a	486.2 a	353.0 d	11798.3 a
	1:1DH605	79350.0 a	473.3 b	384.5 a	11798.3 a
	2:2ZD958	78852.5 a	490.0 a	357.9 cd	11826.6 a
	2:2DH605	78887.5 a	473.1 b	380.1 ab	11826.6 a

年份 Year	处理 Treatment	SOD (U g^-1FW min^-1)				POD (U g^-1FW min^-1)
年份 Year	处理 Treatment	VT	VT+10	VT+30	VT+50	VT	VT+10	VT+30	VT+50
2016	SZD958	576.3 b	607.3 b	350.4 c	242.9 c	198.6 ab	220.1 a	197.0 c	142.9 d
	SDH605	580.1 ab	602.6 ab	356.7 b	255.6 b	200.2 ab	221.2 a	199.6 bc	144.5 d
	M	578.4 ab	607.4 a	362.3 a	265.8 a	201.0 ab	224.5 a	206.8 a	152.3 ab
	1:1 ZD958	577.1 b	606.7 a	362.4 a	256.7 b	199.6 ab	220.6 a	203.5 ab	150.4 bc
	1:1 DH605	584.0 a	596.0 b	357.0 b	265.9 a	198.1 b	224.1 a	203.2 ab	149.9 c
	2:2 ZD958	581.7 ab	602.2 ab	358.0 ab	255.9 b	200.3 ab	223.3 a	199.1 bc	145.2 d
	2:2 DH605	583.4 a	605.9 a	360.6 ab	254.6 b	201.7 a	221.7 a	203.0 ab	152.8 a
2017	SZD958	593.0 a	614.0 ab	359.1 c	256.2 c	202.0 a	234.5 ab	198.6 c	148.5 c
	SDH605	589.4 a	610.6 ab	366.6 bc	262.3 c	204.8 a	232.8 b	205.0 bc	154.2 bc
	M	588.4 a	616.1 a	380.9 a	279.1 ab	205.0 a	238.5 ab	213.5 a	165.6 a
	1:1 ZD958	583.8 a	614.3 ab	374.7 ab	273.4 b	203.9 a	242.3 ab	210.5 ab	163.7 ab
	1:1 DH605	592.3 a	609.3 b	380.9 a	281.6 a	200.8 a	244.1 a	213.6 a	164.2 a
	2:2 ZD958	591.7 a	608.9 b	381.4 a	280.2 ab	203.6 a	239.9 ab	212.4 a	161.9 ab
	2:2 DH605	590.1 a	612.6 ab	377.3 a	283.0 a	205.1 a	238.6 ab	213.6 a	164.8 a

年份 Year	处理 Treatment	MDA (μmol mg^-1 FW)				可溶性蛋白 Soluble protein (mg g^-1 FW)
年份 Year	处理 Treatment	VT	VT+10	VT+30	VT+50	VT	VT+10	VT+30	VT+50
2016	SZD958	15.5 ab	19.0 bc	24.9 a	37.3 b	26.0 a	30.3 bc	37.6 b	25.4 d
	SDH605	15.2 bc	18.5 c	24.7 ab	38.4 a	26.2 a	30.8 b	37.7 b	25.7 cd
	M	15.0 bc	20.0 a	23.1 d	33.8 e	25.5 b	32.4 a	39.0 a	26.7 a
	1:1 ZD958	14.9 c	19.5 ab	24.0 c	35.2 d	25.5 bc	30.8 b	38.4 ab	26.0 bc
	1:1 DH605	15.0 bc	19.0 bc	24.3 bc	36.4 c	25.6 b	29.6 c	38.9 a	26.4 ab
	2:2 ZD958	15.9 a	19.5 ab	23.8 c	34.4 de	25.3 cd	29.5 c	38.4 ab	26.6 a
	2:2 DH605	15.4 abc	19.1 bc	24.1 b	37.4 b	25.2 d	30.7 b	38.9 a	26.5 ab
2017	SZD958	15.2 a	18.9 ab	24.4 ab	37.0 a	25.4 a	29.7 b	34.9 c	24.4 c
	SDH605	14.9 a	18.7 ab	24.6 a	37.3 a	24.6 b	30.1 ab	35.2 bc	24.9 bc
	M	14.5 a	18.1 b	22.7 c	33.8 c	25.2 ab	31.1 a	36.3 a	26.0 a
	1:1 ZD958	14.2 a	18.1 b	23.0 c	34.0 c	25.0 ab	29.7 ab	36.0 ab	25.4 ab
	1:1 DH605	14.8 a	18.3 ab	23.4 bc	35.4 b	24.6 ab	29.3 b	36.5 a	25.8 a
	2:2 ZD958	14.6 a	19.1 a	22.9 c	34.7 bc	25.1 ab	29.5 b	36.1 a	25.7 a
	2:2 DH605	14.7 a	18.5 ab	23.3 bc	35.5 b	25.4 ab	29.8 ab	36.4 a	25.2 a

Effects of Mixed-cropping with Different Varieties on Photosynthetic Characteristics and Yield of Summer Maize under Close Planting Condition

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