Effects of tillage patterns on soil respiration in summer maize field in Hexi Oasis irrigation area

doi:10.7522/j.issn.1000-694X.2023.00019

Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (4): 200-208.DOI: 10.7522/j.issn.1000-694X.2023.00019

Effects of tillage patterns on soil respiration in summer maize field in Hexi Oasis irrigation area

Yansong Feng(), Caihong Yang(), Yuquan Qiang

College of Forest，Gansu Agricultural University，Lanzhou 730070，China

Received:2022-10-21 Revised:2023-03-07 Online:2023-07-20 Published:2023-08-14
Contact: Caihong Yang

Abstract

Abstract:

In this experiment， summer corn field soil in Hexi Oasis irrigation area was selected as the research object. Two tillage modes were set， namely， no-tillage （NT） and traditional tillage （CT）， and three planting modes were maize intercropping wheat （W/M）， maize wheat rotation （W→M） and maize rotation （W-G→M） after wheat intercropping and winter rape returning to field. In order to investigate the effects of different tillage modes on the characteristics of soil respiration in summer maize fields in Hexi Oasis irrigation area， soil respiration rate， soil temperature and soil moisture content were measured at different growth periods of summer maize. The results showed that the diurnal variation of summer maize field soil respiration was obvious under different cultivation modes in Hexi Oasis irrigation area， and the peak value appeared at about 15：00， and the peak value of maize growth period appeared at jointing stage （early June）. Soil respiration rate was positively correlated with soil temperature and soil water content， and the diurnal variation of soil respiration rate was mainly affected by soil temperature of 5cm. The temperature sensitivity Q₁₀ values of soil respiration under six different tillage modes ranged from 1.60 to 2.70， and the values of no-tillage were higher than those under traditional tillage， in order of NT W→M>NT W/M>NT W-G→M>CT W-G →M>CT W→M>CT W→M>CT W/M. Soil respiration of summer maize field under different cultivation modes in Hexi Oasis irrigation area was affected not only by soil temperature but also by soil water content.

Key words: Hexi Oasis irrigation area, farming methods, summer corn, soil respiration

CLC Number:

S153

Yansong Feng, Caihong Yang, Yuquan Qiang. Effects of tillage patterns on soil respiration in summer maize field in Hexi Oasis irrigation area[J]. Journal of Desert Research, 2023, 43(4): 200-208.

Figures/Tables 8

Fig.1 Changes of soil moisture content in maize under different tillage modes

Fig.2 Soil temperature changes at different growth stages of maize under different tillage modes

Fig.3 Diurnal variation of soil respiration rate in different growth periods of maize under different tillage patterns

Fig.4 Diurnal variation of ground temperature at 5 cm in different growing periods of maize under different tillage modes

Fig.5 Changes of soil respiration rate under different tillage patterns at different growth stages of maize

Table 1 The relationship between soil respiration rate and soil temperature （5 cm） under different tillage patterns and the sensitivity coefficient of soil respiration temperature

处理	线性函数		指数函数		Q₁₀
处理	拟合方程	拟合系数R²	拟合方程	拟合系数R²	Q₁₀
NT W/M	$y = 0.2723 x - 2.8075$	0.45	$y = 0.5921 e 0.07517 x$	0.44	2.12
CT W/M	$y = 0.2150 x - 1.012$	0.39	$y = 1.316 e 0.0470 x$	0.39	1.60
NT W-G→M	$y = 0.2791 x - 2.190$	0.55	$y = 0.9053 e 0.06553 x$	0.53	1.93
CT W-G→M	$y = 0.2821 x - 1.983$	0.55	$y = 1.066 e 0.06125 x$	0.53	1.85
NT W→M	$y = 0.3969 x - 4.221$	0.58	$y = 0.5059 e 0.0979 x$	0.58	2.66
CT W→M	$y = 0.2672 x - 1.470$	0.59	$y = 1.131 e 0.0606 x$	0.58	1.83

Table 1 The relationship between soil respiration rate and soil temperature （5 cm） under different tillage patterns and the sensitivity coefficient of soil respiration temperature

处理	线性函数		指数函数		Q₁₀
处理	拟合方程	拟合系数R²	拟合方程	拟合系数R²	Q₁₀
NT W/M	$y = 0.2723 x - 2.8075$	0.45	$y = 0.5921 e 0.07517 x$	0.44	2.12
CT W/M	$y = 0.2150 x - 1.012$	0.39	$y = 1.316 e 0.0470 x$	0.39	1.60
NT W-G→M	$y = 0.2791 x - 2.190$	0.55	$y = 0.9053 e 0.06553 x$	0.53	1.93
CT W-G→M	$y = 0.2821 x - 1.983$	0.55	$y = 1.066 e 0.06125 x$	0.53	1.85
NT W→M	$y = 0.3969 x - 4.221$	0.58	$y = 0.5059 e 0.0979 x$	0.58	2.66
CT W→M	$y = 0.2672 x - 1.470$	0.59	$y = 1.131 e 0.0606 x$	0.58	1.83

Table 2 Relationship between soil respiration rate and soil water content under different tillage patterns

土层	处理	拟合方程	拟合系数R²	P
0~5 cm	NT W/M	$y = 0.08074 x 2 - 1.997 x + 15.58$	0.49	<0.01
	CT W/M	$y = 1579 x 2 - 1.997 x + 25.38$	0.59	<0.01
	NT W-G→M	$y = 1406 x 2 - 378.6 x + 22.59$	0.44	<0.01
	CT W-G→M	$y = 1766 x 2 - 338.2 x + 24.72$	0.60	<0.01
	NT W→M	$y = - 76.88 x 2 - 402.4 x + 0.3044$	0.58	<0.01
	CT W→M	$y = 1631 x 2 - 350.6 x + 21.39$	0.51	<0.01
5~20 cm	NT W/M	$y = - 2204 x 2 + 605.0 x - 36.56$	0.48	<0.01
	CT W/M	$y = 717.8 x 2 - 226.0 x + 19.62$	0.55	<0.01
	NT W-G→M	$y = 61.69 x 2 - 30.05 x + 5.948$	0.36	<0.01
	CT W-G→M	$y = - 151.7 x 2 + 18.48 x + 3.900$	0.58	<0.01
	NT W→M	$y = - 1127 x 2 + 285.0 x - 13.32$	0.57	<0.01
	CT W→M	$y = - 223.0 x 2 + 66.33 x - 1.929$	0.46	<0.01
20-30 cm	NT W/M	$y = - 3261 x 2 + 962.3 x - 65.13$	0.61	<0.01
	CT W/M	$y = 58.06 x 2 - 55.06 x + 9.188$	0.56	<0.01
	NT W-G→M	$y = - 1021 x 2 + 259.4 x - 11.88$	0.71	<0.01
	CT W-G→M	$y = 1449 x 2 - 372.0 x + 26.35$	0.75	<0.01
	NT W→M	$y = - 1843 x 2 + 475.1 x - 25.43$	0.76	<0.01
	CT W→M	$y = - 512.0 x 2 + 108.7 x - 2.080$	0.44	<0.01

Table 2 Relationship between soil respiration rate and soil water content under different tillage patterns

土层	处理	拟合方程	拟合系数R²	P
0~5 cm	NT W/M	$y = 0.08074 x 2 - 1.997 x + 15.58$	0.49	<0.01
	CT W/M	$y = 1579 x 2 - 1.997 x + 25.38$	0.59	<0.01
	NT W-G→M	$y = 1406 x 2 - 378.6 x + 22.59$	0.44	<0.01
	CT W-G→M	$y = 1766 x 2 - 338.2 x + 24.72$	0.60	<0.01
	NT W→M	$y = - 76.88 x 2 - 402.4 x + 0.3044$	0.58	<0.01
	CT W→M	$y = 1631 x 2 - 350.6 x + 21.39$	0.51	<0.01
5~20 cm	NT W/M	$y = - 2204 x 2 + 605.0 x - 36.56$	0.48	<0.01
	CT W/M	$y = 717.8 x 2 - 226.0 x + 19.62$	0.55	<0.01
	NT W-G→M	$y = 61.69 x 2 - 30.05 x + 5.948$	0.36	<0.01
	CT W-G→M	$y = - 151.7 x 2 + 18.48 x + 3.900$	0.58	<0.01
	NT W→M	$y = - 1127 x 2 + 285.0 x - 13.32$	0.57	<0.01
	CT W→M	$y = - 223.0 x 2 + 66.33 x - 1.929$	0.46	<0.01
20-30 cm	NT W/M	$y = - 3261 x 2 + 962.3 x - 65.13$	0.61	<0.01
	CT W/M	$y = 58.06 x 2 - 55.06 x + 9.188$	0.56	<0.01
	NT W-G→M	$y = - 1021 x 2 + 259.4 x - 11.88$	0.71	<0.01
	CT W-G→M	$y = 1449 x 2 - 372.0 x + 26.35$	0.75	<0.01
	NT W→M	$y = - 1843 x 2 + 475.1 x - 25.43$	0.76	<0.01
	CT W→M	$y = - 512.0 x 2 + 108.7 x - 2.080$	0.44	<0.01

Table 3 Correlation between soil respiration rate and soil water and heat factors under different tillage patterns

	耕作模式	5 cm 地温	10 cm 地温	15 cm 地温	20 cm 地温	25 cm 地温	0~5 cm 土壤含水量	5~20 cm 土壤含水量	20~30 cm 土壤含水量	土壤呼吸速率
耕作模式	1
5 cm地温	-0.271^**	1
10 cm地温	-0.287^**	0.973^**	1
15 cm地温	-0.279^**	0.948^*	0.985^**	1
20 cm地温	-0.269^**	0.926^**	0.969^**	0.986^**	1
25 cm地温	-0.256^**	0.920^**	0.961^**	0.961^**	0.978^**	1
0~5 cm土壤含水量	-0.202^**	0.126^**	0.126^**	0.123^**	0.121^**	0.123^**	1
5~20 cm土壤含水量	-0.189^**	0.113^**	0.110^**	0.106^*	0.102^**	0.103^**	0.967^**	1
20~30 cm土壤含水量	-0.239^**	0.124^**	0.123^**	0.117^**	0.114^**	0.115^**	0.957^**	0.959^**	1
土壤呼吸速率	0.013	0.434^**	0.419^**	0.414^**	0.412^**	0.411^**	0.102^**	0.116^**	0.121^**	1

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Effects of tillage patterns on soil respiration in summer maize field in Hexi Oasis irrigation area

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