不同覆盖方式对旱作马铃薯生长及土壤水热特征的影响

普雪可,吴春花,勉有明,苗芳芳,侯贤清,李荣

Effects of Different Mulching Patterns on Growth of Potato and Characteristics of Soil Water and Temperature in Dry Farmland

XueKe PU,ChunHua WU,YouMing MIAN,FangFang MIAO,XianQing HOU,Rong LI

表1 不同处理土壤温度拟合特征和变异系数

Table 1 Fitting characteristic and coefficient of variation in the soil temperatures under different treatments

年份 Year	处理 Treatment	马铃薯生育期不同土层平均土壤温度 Average soil temperature in different soil layers of potato growing period (°C)					拟合公式 Fitting formula	判定系数 Determination coefficient (R²)	变异系数 Variation coefficient (%)
年份 Year	处理 Treatment	5 cm	10 cm	15 cm	20 cm	25 cm	拟合公式 Fitting formula	判定系数 Determination coefficient (R²)	变异系数 Variation coefficient (%)
2015	DD	20.45a	19.91a	18.91a	17.42a	17.50a	Y=21.48e^-0.009x	0.93	6.52
	DJ	17.34b	16.42b	15.70c	15.38b	15.56b	Y=17.49e^-0.006x	0.82	4.50
	DB	19.89a	17.87ab	16.82bc	17.50a	15.77ab	Y=20.27e^-0.01x	0.81	7.77
	CK	19.21ab	17.70ab	17.62ab	18.64a	14.55b	Y=20.32e^-0.01x	0.54	9.19
2016	DD	22.61a	21.94a	20.78a	20.73a	20.21a	Y=23.11e-0.006x	0.90	4.15
	DJ	20.34b	19.86b	19.41a	19.30a	19.32a	Y=20.43e-0.003x	0.85	2.06
	DB	21.25ab	20.95a	19.57a	19.68a	18.56ab	Y=22.08e^-0.007x	0.915	4.90
	CK	21.20ab	20.98a	19.42a	20.90a	16.83b	Y=22.77e^-0.009x	0.57	8.29