赤红壤坡地幼龄果园间种不同牧草的生态环境效应

Eco-environmental Effects of Fruit Trees and Different Pasture Inter-planting Systems in Young Orchard on Slope Land of Latored soils (Hapludox )

在赤红壤坡地幼龄果园间种６种牧草，对其生态环境效应进行了试验观测。结果发现，果园间种牧草可明显增大地面覆盖，增加土壤的保水能力，减少水土流失，提高了土壤肥力和土地生产力。然而，由于有些牧草生长旺盛、生物量大，高度和覆盖度大，不可避免地与果树争肥、争水、争光，特别是在贫瘠的坡地上或在干旱季节里。文章指出，幼龄果园间种牧草是一种较好的坡地可持续利用模式，但在牧草品种的适应性选择应加以深入研究。

Six kinds of pasture were inter-planted in a young orchard on the slope lands of latored soil (hapludox), and their ecoenvironmental effects were observed. It showed that young fruit trees inter-planting pasture would obviously increase the land coverage and soil water capacity, and decrease water loss and soil erosion. On the other hand, this farming system could also improve soil fertility and land productivity. However owing to the big biomass, high coverage and productivity of pasture, they would compete for the soil nutrients, water and light with fruit trees, especially in the barren soils or in the dry seasons. The author suggests that young orchard inter-planting pasture Should be a good sustainable land utilization system, but deeper study should be conducted in the selection of suitability.