耕作模式对河西绿洲灌区夏玉米农田土壤呼吸的影响

冯彦淞, 杨彩红, 强玉泉

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

Yansong Feng, Caihong Yang, Yuquan Qiang

表2 不同耕作模式的土壤呼吸速率与土壤含水量间的关系

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