摘要
水土保持技术,实质上是栽培技术和耕作技术一体化的研究成果。所谓一体化,是指栽培措施和耕作措施之间没有任阿矛盾,而是相互促进,相得益彰。我们的研究结果指出,要做到这一点,必须用土壤胶体物理和胶体化学的方法,找出既有利于土壤充分发挥胶体活性,又有利于全部生态因子的相互谐调,从而达到滴水归田,防早防洪的目的。办法是在表土或覆盖物中加入钾肥以及膨润土等助渗剂,来改进土壤渗透性能,杜绝土壤中碱性胶基阻碍渗透的不良效应,也可和等高垄作、地面覆盖等措施结合在一起,更好地发挥保持水土和免耕免灌等效益。
The term of soil conservation is in fact an intimate union of crop-grow ing technics and tillage practice,which is proved to give no rise of contradictions that may occur between crop-growing practices and soil tillage manipulations, but on the contrary, only mutural beneficial effects. An attempt has been made by the authors of this paper during the past few years as to find out the best way to retain local rainfall to such an extent as to eliminate any fear of severe drought or dreadful floods.Taking soil colloid property into consideration,we believed any search trials must lead to search a device which would be favourablein stimulating activities of soil colloids as well as in ample utilization of some ecological factors of soil science such as rainfall and radial heat.Our data given in this paper finally support our view point that only search means which are capable of improving infiltration power of soils are proved equally efficient in soil conservation and drought resistances.It may be also noticed that potassium chloride and bentonite powder are proved useful in reducing unfavourable infiltration power produced by soil of low sesquioxide ratios,
出处
《水土保持学报》
CSCD
北大核心
1989年第4期23-28.4,共6页
Journal of Soil and Water Conservation
