间作模式下不同带宽对土壤含水量的影响

Effects of Different Bandwidths on Soil Moisture Content under Intercropping Patterns

为探究间作模式下不同带宽对台塬坡耕地土壤含水量的影响,本研究选取在小偉河流域彭家底村,连续两年在不同坡度(5°、10°、15°)下的坡耕地布设不同宽度的玉米与苜蓿间作试验,使用中子水分测定仪和便携式时域反射仪(TDR)相结合,对不同带宽下的苜蓿条带、玉米条带的土壤含水量进行监测及分析。结果表明:玉米苜蓿间作下,地表含水量均小于深层土壤含水量;苜蓿条带内表层储水量略大于玉米,但深层土壤上,玉米的储水量大于苜蓿;在各带宽中,以5m带宽储水量较高,利于作物生长。研究结果对探求坡耕地粮草间作套种的最优模式,以及坡耕地管理技术提供参考。

In order to investigate the effect of different bandwidths on soil moisture content of sloping farmland in loess tableland under intercropping mode,this study selected Pengjiadi Village in the Xiaowei River Basin,and conducted intercropping experiments of corn and alfalfa with different widths on sloping farmland at different slopes(5°,10°,15°)for two consecutive years.A neutron moisture analyzer and a portable time-domain reflectometer(TDR)were combined to monitor and analyze the soil moisture content of the alfalfa strips and corn strips under different bandwidths.The results showed that under the intercropping of corn and alfalfa,the surface water content was lower than the deep soil water content;The surface water storage in the alfalfa strip is slightly greater than that of corn,but in the deep soil,the water storage of corn is greater than that of alfalfa;Among the various bandwidths,the water storage capacity of 5m is higher,which is beneficial for crop growth.The research results provide reference for exploring the optimal mode of intercropping and intercropping of grain and grass on slope farmland,as well as for slope farmland management techniques.