不同耕作措施对宁南地区土壤物理性质及作物产量的影响

doi:10.3864/j.issn.0578-1752.2023.18.005

Abstract

Abstract:

【Objective】In order to solve the problems of insufficient precipitation, shallow plough layer and low water use efficiency in the dry land of Southern Ningxia, we investigated the effects of different tillage practices on soil physical properties and crop yield in the region of southern Ningxia, and provided certain theory support for improving the topsoil structure reasonably in dryland, selecting the suitable tillage practice and increasing crop yield and benefit. 【Method】using potato and spring wheat as test crops, two tillage methods and four tillage depths of conventional ploughing 20 cm (C20, as a control), deep ploughing 30 cm (C30), subsoiling 30 cm (S30), subsoiling 40 cm (S40) and subsoiling 50 cm (S50) were set in arid region of southern Ningxia between 2019 and 2020 for the two-year field experiment to study the effects of different tillage methods with depths on soil bulk density during the harvest period, soil compactness water storage, and crop biomass during the growth periods,, yield and water use efficiency. 【Result】The average soil bulk density at 0-60 cm layer in potato season and spring wheat season under the S50 treatment was significantly decreased by 6.49% and 6.94%, compared with the control treatment. In the whole growth period, the average soil compactness with the S50 treatment in potato season and spring wheat season was the lowest, which was significantly increased by 19.32% and 8.11%, respectively, compared with the control treatment. The improvement in the soil water storage with the S50 treatment during the whole growth period in potato season and spring wheat season was the best, which was significantly increased by 13.58% and 25.66%, respectively, compared with the control treatment. The S40 treatment had the highest dry matter accumulation in potato season and spring wheat season. Crop yield, net income and water use efficiency were the highest under the S40 treatment in potato season and spring wheat season, which were significantly increased by 15.20%, 18.90% and 9.10% in potato season, and increased by 59.24%, 88.20% and 28.98% in spring wheat season, when compared with the control treatment. The tillage methods with depths had extremely significant effects on soil water storage, crop biomass and yield, while soil density and compactness were extremely affected by tillage methods. 【Conclusion】The tillage method combined with depth could significantly improve the topsoil structure, and increase soil water storage during the crop growing period, thereby promoting the increase of crop yield and water use efficiency. The subsoiling 40 cm treatment had the best effect of crop yield and income increasing in potato and spring wheat season, and it could be further promoted and applied in the cultivation of potato and spring wheat for high yield and efficiency in the region of southern Ningxia.

Key words: tillage method, tillage depth, soil physical characteristics, soil water, crop yield

LI Rong, YAN HuiFang, ZHANG Long, MIAO FangFang, MIAN YouMing, HOU XianQing. Effects of Different Tillage Practices on Soil Physical Properties and Crop Yield in the Region of Southern Ningxia[J].Scientia Agricultura Sinica, 2023, 56(18): 3543-3555.

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作物季 Crop season	处理 Treatment	0-20 cm	20-40 cm	40-60 cm
马铃薯季 Potato season	处理前 Before treating	1.30±0.03a	1.37±0.04a	1.41±0.06a
	C20	1.27±0.01ab	1.35±0.00ab	1.38±0.04a
	C30	1.25±0.02b	1.32±0.04b	1.37±0.03a
	S30	1.23±0.02b	1.26±0.01c	1.34±0.01b
	S40	1.21±0.05bc	1.25±0.00c	1.32±0.02b
	S50	1.20±0.05c	1.23±0.01c	1.31±0.01b
春小麦季 Spring wheat season	处理前 Before treating	1.32±0.03b	1.38±0.01a	1.42±0.05a
	C20	1.31±0.07a	1.35±0.04a	1.39±0.03a
	C30	1.27±0.01a	1.33±0.01a	1.36±0.04a
	S30	1.24±0.01c	1.31±0.01ab	1.33±0.04b
	S40	1.21±0.03c	1.30±0.01b	1.32±0.01b
	S50	1.20±0.02c	1.27±0.05b	1.30±0.08b

作物生长季 Crop growth season	处理 Treatment	产量 Yield (kg·hm^-2)	水分利用效率 Water use efficiency (kg·hm^-2·mm^-1)	投入 Input (yuan/hm²)	产出 Output (yuan/hm²)	纯收益 Net income (yuan/hm²)	产投比 Output/Input
马铃薯季 Potato season	C20	28120.8±4409.4b	69.50±4.3ab	9842	33745.0±4409.4b	23903.5±4409.4b	3.4±0.2b
	C30	29692.9±1988.2ab	66.47±4.6b	10142	35631.5±1988.2ab	25490.0±1988.2ab	3.5±0.3ab
	S30	29159.6±888.5ab	72.01±5.1ab	10142	34991.5±888.5ab	24850.0±888.5ab	3.5±0.3ab
	S40	32388.1±379.1a	76.39±8.9a	10442	38865.6±379.1a	28424.6±379.1a	3.7±0.2a
	S50	31889.8±459.5a	72.14±10.2ab	10742	38267.6±459.5a	27526.1±459.5a	3.6±0.6ab
春小麦季 Spring wheat season	C20	3403.9±203.2c	58.60±3.41c	4442	10209.0±203.2c	5767.5±203.2c	2.3±0.2b
	C30	3915.4±308.3b	64.21±3.30b	4742	11745.9±308.3b	7004.4±308.3b	2.5±0.3ab
	S30	5152.8±55.9a	75.58±5.42a	4742	15458.4±55.9a	10717.4±55.9a	3.3±0.9a
	S40	5420.4±35.8a	72.44±6.71a	5042	16260.0±35.8a	10855.5±35.8a	3.2±0.8a
	S50	5328.9±304.5a	70.67±6.52a	5342	15986.7±304.5a	10645.7±304.5a	3.0±0.5a

作物生长季 Crop growing season	因子 Factor		Y	X1	X2	X3	X4
马铃薯季 Potato season	R	X1	-0.991**	1
		X2	-0.697	0.942*	1
		X3	0.795	-0.715	-0.616	1
		X4	0.939**	-0.825	-0.802	0.748	1
	F	T	342.72**	12.21*	11.43*	27.66**	3282.70**
		D	174.63**	46.00**	2.09ns	238.70**	371.28**
		T×D	127.83**	65.63**	3.03ns	322.55**	101.65**
春小麦季 Spring wheat season	R	X1	-0.894*	1
		X2	-0.726	0.665	1
		X3	0.613	-0.524	-0.506	1
		X4	0.939**	-0.504	-0.931*	0.611	1
	F	T	4595.24**	5.18*	4.99*	2031.91**	1002.61**
		D	623.823**	0.75ns	2.31ns	559.12**	443.25**
		T×D	12.10**	1.478ns	4.304ns	369.791**	27.53**

Effects of Different Tillage Practices on Soil Physical Properties and Crop Yield in the Region of Southern Ningxia

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