橡胶幼龄林下间作菠萝对水上流失的影响

本实验旨在探讨橡胶幼龄林下间作菠萝对水土流失的影响。采用单因素随机区组设计的方法，测定了顺坡种植菠萝，横坡种植菠萝和不间作（对照）条件下的径流量及土壤侵蚀量。结果表明：西双版纳雨季时，5～10月间。横坡和顺坡种植菠萝径流量均低于不问作菠萝，顺坡种植在6～9月间的径流量都高于横坡种植：6～10月间．顺坡种植和横坡种植菠萝能显著降低林间侵蚀量，横坡种植在6～9月间侵蚀量均低于顺坡种植；径流量、侵蚀量和降雨量的变化趋势基本相同；顺坡和横坡种植的总径流和总侵蚀量均显著减少。说明橡胶幼龄林下横坡种植菠萝可以有效减轻林地水土流失。

Effect of Intercropping Pineapple on Soil Loss in Young Rubber Plantations

The experiment was conducted to investigate the effect of intercropping pineapple on soil loss in the young rubber plantation. The fields were randomly allotted into three treatments to evaluate the runoff and soil erosion under the conditions of longitudinal-slope, cross-slope and non （control） intercropping cultivation of pineapple. The results showed that the runoffs of cross-slope and longitudinal-slope pineapple cultivation were lower than control from May to October in rainy season in Xishuangbanna, and the runoff in longitudinal-slope cultivation was higher than cross-slope from June to September. Cross-slope and longitudinal-slope pineapple cultivation significantly reduced erosion from June to October, and the erosion in cross-slope cultivation was lower than longitudinal-slope from June to September. Runoff and erosion were same with the trend of rainfall. The total runoff and total erosion of longitudinal-slope and cross-slope cultivation were significantly reduced. It was indicated that cross-slope cultivation of pineapple reduced soil loss effectively in the young rubber plantation.