膜下滴灌不同种植方式土壤水流动系统特征研究

Research on the Characteristics of the Soil Water Movement of Drip Irrigation under Mulch in Different Cropping Patterns

从土壤水流动系统的角度分析了膜下滴灌不同种植方式下土壤水流动系统特征。2001年和2002年在甘肃民勤县小坝口灌溉试验站进行的试验表明:在土壤水分状况方面,1控3行明显优于1控4行,内行优于外行,灌溉定额的增减对外行的影响要远远大于对内行的影响;在作物生理生态指标方面,1控3行整体上不如1控4行;但在产量上,1控3行优于1控4行,其中铃重下降和铃数的减少是造成棉花减产的主要原因。

The paper analyzed the characteristics of the soil water movement of drip irrigation under mulch in different cropping patterns. The field experiments were conducted at Xiaobakou Irrigation Experimental Station of Minqin Country, Gansu province in 2001and 2002. The experiments show that in terms of soil moisture, it is found that the mode of “1 pipe for 3 lines” excels the mode of “1 pipe for 4 lines”, the inside line is better than the outside line, and that influence of changes in irrigation water quotas on the inside lines is bigger than that on the outside line; in terms of crop physiological index, the mode of “1 pipe for 3 lines” is not as good as the mode of “1 pipe for 4 lines”; in terms of yields, the mode of “1 pipe for 3 lines” is better than that of “1 pipe for 4 lines”. The decreases in bell weight and bell number are the most important reasons for the reduction of cotton output.