不同种植方式下的脐橙经济林水土保持效果分析

Soil and Water Conservation Effect Analysis of Orange Economic Forest under Different Cultivation Patterns

在经济林产业发展的背景下,水土流失成为严重生态问题。研究提出在脐橙经济林内套作大豆、套作百喜草、间作梨树3种种植方式,并在不同坡位进行3种种植方式下的土壤含水量、土壤容重、雨季水土流失量的测定。结果表明,套作大豆具有较好的保水效果,套作百喜草次之,上坡位间作梨树也有一定效果。套作大豆或百喜草有利于表层土壤容重的降低,然而该种植方式对中、下层土壤改良效果不明显;间作对土壤容重上、中、下各层次均有改良。水土流失主要集中在中、上两个坡位,研究发现套作大豆和百喜草均可显著降低中坡和上坡的水土流失量。

With the development of economic forest industry,soil erosion became the serious ecological problem.In this study,it presented three cultivation patterns in orange economic forest,relay intercropping bahia grass,relay intercropping soybean and row intercropping pear.Soil moisture,soil bulk density and the rate of soil and water loss were determined in the rainy season under the three patterns of different slope positions.The results showed that relay intercropping soybean maintained water best in the three patterns.The bulk density reduced both in the relay intercropping patterns of soybean and bahia grass in the topsoil,but the reduction was not obviously in the middle and lower soil layers.The reduction of bulk density was remarkable in the pattern of row intercropping pear in the three soil layers.Soil erosion mainly occurred on the middle and uphill slope position.The results in this study revealed that relay intercropping soybean and bahia grass could reduce the rate of soil and water loss significantly on the middle and uphill slope position.