不同颜色地膜和种植密度对春玉米田间地温、耗水及产量的影响

doi:10.3864/j.issn.0578-1752.2019.19.004

Abstract

Abstract:

【Objective】 Field experiments were conducted to explore the effects of different colored plastic film mulching and planting density on the topsoil temperature, evapotranspiration, grain yield of spring maize and precipitation utilization efficiency in the rain-fed area of Northeast China, in order to further tap the water production potential of dryland and rain-fed maize. 【Method】 Complete combination field, including three types of mulching ( non-mulching, transparent plastic film mulching and black plastic film mulching ) and three planting densities ( 60 000, 75 000 and 90 000 plants/hm ²) , were conducted to monitor the topsoil temperature dynamics in 0-25 cm depths and the soil moisture dynamics in 0-120 cm depths, and to analyze the water use efficiency combined with grain yield of maize in 2016-2018.【Result】 The results showed that the accumulated temperature of the plough layer in the transparent mulching film treatment was significantly higher than that in the black mulching film, and the accumulated temperature of the plough layer in the black mulching film treatment was significantly higher than that in the non-mulching treatment in the early growth stages of maize. The increase of planting density reduced the accumulated temperature of the plough layer after jointing stage of maize. For the evapotranspiration of the growing season, there was no significant difference between the black plastic film mulching treatment and the transparent plastic film mulching treatment, but they were significantly lower than the non-mulching treatment. The evapotranspiration increased with the increasing of the planting density whether in the normal precipitation year or the dry year. Maize grain yields and water use efficiency were significantly improved in the black plastic film mulching treatment, with an average of 4.3% and 4.6% higher than that of the transparent plastic film mulching treatment, respectively, and 9.2% and 13.3% higher than that of the non-mulching treatment, respectively. Yield and water use efficiency increased in tandem with planting density under the same mulching treatment. The plastic film mulching significantly improved the economic benefits under high-density treatment, and the profit of the black plastic film mulching was 807.82 yuan/hm ² more than that of the transparent plastic film mulching.【Conclusion】 The cultivation mode of black plastic film mulching and high density (90 000 plants/hm ²) combined treatment could improve the utilization rate of natural precipitation and achieve the highest water use efficiency on the basis of ensuring high grain yields. This paper provided a scientific and effective way to further tap the water and crop production potential in the dryland and rain-fed regions of China

Key words: maize, different colored plastic film, accumulated temperature of the plough layer, evapotranspiration, yield, water use efficiency, economic benefit.

SUN ShiJun,ZHU ZhenChuang,CHEN ZhiJun,YANG Dan,ZHANG XuDong. Effects of Different Colored Plastic Film Mulching and Planting Density on Soil Temperature, Evapotranspiration and Yield of Spring Maize[J].Scientia Agricultura Sinica, 2019, 52(19): 3323-3336.

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References 32

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覆盖处理 Mulching	种植密度 Planting density (plants/hm²)	处理编号 Treatment
裸地 Non-mulching	60000	M0D1
	75000	M0D2
	90000	M0D3
透明地膜覆盖 Transparent plastic film mulching	60000	M1D1
	75000	M1D2
	90000	M1D3
黑色地膜覆盖 Black plastic film mulching	60000	M2D1
	75000	M2D2
	90000	M2D3

处理 Treatment	2016	2017	2018
M0D1	10516.0±369.6b	10540.1±351.9b	9708.3±422.4b
M0D2	13086.0±511.7a	12124.1±565.3a	11032.8±307.8a
M0D3	12885.7±120.1a	12576.1±173.0a	11504.8±699.5a
均值Mean	12162.6±1277.6B	11746.7±987.7C	10748.7±917.2C
M1D1	11426.6±126.4c	11024.6±254.1c	10346.8±428.3b
M1D2	12839.9±334.6b	12244.3±470.8b	11500.1±604.2a
M1D3	13687.2±743.2a	13419.8±265.9a	12306.4±246.9a
均值Mean	12651.2±1071.6AB	12229.6±1079.4B	11384.4±938.0B
M2D1	11503.5±549.1c	11350.1±495.0b	10773.0±488.0c
M2D2	13201.7±621.4b	13300.7±267.4a	12101.8±326.9b
M2D3	14264.6±315.3a	13804.5±546.2a	13140.3±86.0a
均值Mean	12989.9±1285.1A	12818.5±1189.1A	12005.0±1069.6A
M	*	**	*
D	**	**	**
M×D	*	ns	ns

因子 Factor	相关系数 Correlation coefficient	直接通径系数 Direct path coefficient	间接通径系数 Indirect path coefficient					R²贡献率Contribution rate R²
因子 Factor	相关系数 Correlation coefficient	直接通径系数 Direct path coefficient	X₁	X₂	X₃	X₄	X₅	R²贡献率Contribution rate R²
X₁	0.23	0.9133		-0.4942	-0.093	-0.0296	-0.0686	0.2101
X₂	-0.38*	-0.8244	0.5474		-0.0162	0.0228	-0.1107	0.3133
X₃	0.31	-0.1982	0.4284	-0.0676		-0.0158	0.1597	-0.0614
X₄	-0.22	-0.1632	0.1658	0.1154	-0.0191		-0.3209	0.0359
X₅	-0.54**	-0.4220	0.1486	-0.2163	0.075	-0.1241		0.2279

因子Factor	相关系数 Correlation coefficient	直接通径系数 Direct path coefficient	间接通径系数 Indirect path coefficient					R²贡献率Contribution rate R²
因子Factor	相关系数 Correlation coefficient	直接通径系数 Direct path coefficient	X₁	X₂	X₃	X₄	X₅	R²贡献率Contribution rate R²
X₁	0.33	0.4398		0.0328	-0.0611	-0.0655	-0.0162	0.1451
X₂	0.72*	0.1175	0.1227		0.1051	0.1787	0.1937	0.0846
X₃	0.74**	0.4075	-0.0659	0.0303		0.2213	0.1488	0.3016
X₄	-0.41	0.2944	0.0897	-0.1983	-0.3724		-0.2254	-0.1207
X₅	-0.70*	-0.2406	0.1988	-0.0894	-0.3064	-0.2641		0.1684

处理 Treatment	2017		2018
处理 Treatment	耗水量 ET (mm)	水分利用效率 WUE (kg·hm^-2·mm^-1)	耗水量 ET (mm)	水分利用效率 WUE (kg·hm^-2·mm^-1)
M0D1	366.0±7.5b	28.7±1.0b	493.8±12.7c	19.7±0.9b
M0D2	372.9±4.4a	32.5±1.5a	499.8±8.1b	22.1±0.6a
M0D3	373.2±10.5a	33.7±0.5a	504.8±14.0a	22.8±1.4a
均值Mean	371.0±8.2A	31.6±2.4C	499.4±12.4A	21.5±1.7B
M1D1	355.3±7.4b	31.0±0.7c	482.7±11.4b	21.4±0.9c
M1D2	357.1±12.7b	34.3±1.3b	485.6±15.3ab	23.7±1.2b
M1D3	362.8±7.9a	37.0±0.7a	488.5±12.9a	25.2±0.5a
均值Mean	358.4±10.5B	34.1±2.7B	485.6±13.1B	23.4±1.8A
M2D1	357.6±11.3b	31.7±1.4b	482.7±10.4c	22.3±1.0c
M2D2	358.8±6.4b	37.1±0.7a	487.5±12.5b	24.8±0.7b
M2D3	365.8±8.4a	37.7±1.5a	493.2±9.7a	26.6±0.2a
均值Mean	360.7±8.9B	35.5±3.0A	487.8±11.7B	24.6±2.0A
M	**	**	**	**
D	*	**	**	**
M×D	ns	ns	ns	ns

Effects of Different Colored Plastic Film Mulching and Planting Density on Soil Temperature, Evapotranspiration and Yield of Spring Maize

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