不同耕种方式对旱地水分养分渗透量的影响

Effect of Different Ways of Tillage and Planting on the Percolation of Water and Soluble Nutrients in Upland Soil

经两年不同耕种方式对旱地水分、养分渗透量影响研究,结果表明,沿等高线种植渗透水分、养分的效果极显著,比顺坡种植增加渗透水量64％和养分总量79％。间作比净作也增加渗透水量21％和养分总量18％。在各处理组合中,以沿等高线种植、间作、浅耕的渗透水分、养分量最多,顺坡种植、净作、翻耕的渗透量最少,前一处理比后一处理的水分渗透量多106％,养分总量多125％。试验证明,渗透水量多,有利于秋雨春用,减轻冬春旱情,提高小春作物产量。

A two-year research for the effect of different ways of tillage and planting on the percolation of water and soluble nutrients in upland soil showed that the effect is highly significant. The percolation of water and nutrients in contour planting is higher than in the straight planting along slope by 64% and 79%. Respectively. and is higher in intercropping than in pure stand by 21% and 18%, respectively. In various combinations of treatment, the percolation of intercropping and surface tillage is the highest, whears in the combination of straight planting, pure stand and ploughing is the lowest, and the percolation of water and nutrients of the former combination is higher than the latter by 106% and 125% respectively.Experiments also confirmed that the higher percolation of water is condusive to using the autumn rain water in the spring, to alleviating the drought damage in the winter and spring, and, consequently, to increasing the harvests in the summer.