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首页> 外文期刊>African Journal of Biotechnology >Influence of amendments on soil structure and soil loss under simulated rainfall Chinas loess plateau
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Influence of amendments on soil structure and soil loss under simulated rainfall Chinas loess plateau

机译：黄土高原模拟降雨对土壤结构和土壤流失的影响

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Macromolecule polymers are significant?types?of chemical amendments?because of their special structure, useful functions and low cost. Macromolecule polymers as soil amendment provide new territory for studying China’s agricultural practices and for soil and water conservation, because polymers have the ability to improve soil structure, increase rainfall penetration and control slope runoff. Through indoor laboratory experiments and outdoor artificial rainfall simulations, this study applied different consistencies of three amendments;?polypropylene acid (PPA), polythene alcoholic (PTA) and urea-formaldehyde poly-condensate (UR) to China’s Loess and determined their effects on soil physical properties and on runoff-sediment yield. The results indicate that as a result of applying the amendments, (1) the water-stable soil aggregates?content increases by 17.3%, the soil permeability increases by 41.8%, the soil density decreases by 11.2% and the soil water content increases by 28.0% compared to the control; (2) three amendment applied on sloping land can delay runoff and decrease runoff velocity; decrease erosive forces of raindrop impact and flowing water, reduce surface crusting and improve water infiltration, delay runoff engenderation and decrease runnoff velocity and soil erosion yield. Finally, this study also ascertained optimal application quantities and the most effective sort in three amendments, which PPA is most effective at lowering surface runoff, reducing soil loss and increasing soil penetration. These three amendments have broad potential for soil and water conservation; however, the duration of their effect and the optimal application quantities need to be researched further.
机译：大分子聚合物由于其特殊的结构，有用的功能和低成本而成为重要的化学修饰剂类型。高分子聚合物作为土壤改良剂，为研究中国的农业实践以及水土保持提供了新领域，因为高分子聚合物具有改善土壤结构，增加降雨渗透和控制坡度径流的能力。通过室内实验室实验和室外人工降雨模拟，该研究对三种改良剂的不同稠度进行了应用：聚丙烯酸（PPA），聚乙烯醇（PTA）和脲醛缩聚物（UR）对中国黄土的影响，并确定了它们对土壤的影响物理性质和径流沉积物产量。结果表明，采用上述修正方法后，（1）水稳性土壤团聚体含量增加了17.3％，土壤通透性增加了41.8％，土壤密度降低了11.2％，土壤含水量增加了。与对照组相比为28.0％; （2）对坡地进行三处修正可延缓径流，降低径流速度;减少雨滴撞击和流水的侵蚀力，减少地表结垢并改善水的渗透，延迟径流产生并降低径流速度和土壤侵蚀产量。最后，本研究还确定了三个修正案中的最佳施用量和最有效的种类，其中PPA在降低地表径流，减少土壤流失和增加土壤渗透性方面最有效。这三个修正案在水土保持方面具有广阔的潜力。然而，其作用的持续时间和最佳的应用量需要进一步研究。

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