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试验地设在斯里兰卡西南部Paiyagala橡胶种植园。年降雨3100mm,平均最高和最低温度为32℃和24℃,相对湿度高达82％。三种禾草单播或与两种豆科混播在每个橡胶树周围,禾草单播小区每年每公顷施100和200公斤氮素,禾草—豆科混播小区每年每公顷施30和60公斤磷,橡胶树单独施用尿素:磷酸盐:氯化钾:硫酸镁=12:9:9:1的复合肥料,施量为0.4,1.2和1.6公斤/树。试验结果指出:禾草的干物质产
The test site is located in the Paiyagala rubber plantation in south-western Sri Lanka. Annual rainfall 3100mm, the average maximum and minimum temperature of 32 ℃ and 24 ℃, relative humidity as high as 82%. Three grasses were uniaxially or mixed with two legumes around each rubber tree, with grass unicast plot applying 100 and 200 kg of nitrogen per hectare per year and grass and legume mixed communities applying 30 and 60 kilograms per hectare per year Phosphate and rubber trees were used alone. Urea: Phosphate: Potassium chloride: Magnesium sulfate = 12: 9: 9: 1 compounded fertilizer at rates of 0.4, 1.2 and 1.6 kg / tree. The test results indicate that the dry matter production of grass