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在内蒙古河套灌区采用波涌灌溉 ,施用 PAM(土壤结构稳定剂 )和利用地下咸水灌溉等不同处理进行了玉米地水蚀作用的试验研究。结果表明 ,灌溉方式在防止沟中水蚀方面没有太大作用 ,而施用 PAM却有显著效果 ,灌溉水中 PAM的质量分数 w(PAM)为 10× 10 -6时基本上可以起到防止水蚀的作用。在连续灌溉方式下 ,w(PAM)为 10× 10 -6的处理中水样含沙量只有对照的 14 .5 7 ;而在波涌灌溉方式下 ,w(PAM)相同的处理中水样含沙量仅为对照的 0 .91 ;w(PAM)为 2 0× 10 -6的各处理中水样含沙量基本上为 0或接近 0。
In Hetao Irrigation District of Inner Mongolia, water erosion was studied by using surge irrigation, PAM (soil structure stabilizer) and underground saline water irrigation. The results show that the irrigation mode has little effect on the prevention of water erosion in the ditch, while the application of PAM has a significant effect. When the mass fraction of PAM in irrigation water w (PAM) is 10 × 10 -6, it can basically prevent water erosion . Under continuous irrigation, the sediment concentration of water sample with w (PAM) of 10 × 10 -6 was only 14.57 对 of that of the control. In the case of surge irrigation, w (PAM) The sample sediment concentration was only 0 .91% of the control, and the water sample sediment concentration was almost 0 or close to 0 for each treatment with w (PAM) of 20 × 10 -6.