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Surface Runoff and Soil Organic Matter Availability in Bamboo-Based Agroforestry in Lombok Timur District

机译：龙目岛汤姆兰区竹制剂中的地表径流与土壤有机质可用性

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Bamboo-based agroforestry is suitable for soils which are poor in nutrient. The characteristics of bamboo and the rapid closure of  its canopy improve soil cover, soil nutrient availability and soil moisture  content,  and  prevent  erosion  by reducing surface runoff. The  research was aimed at determining the factors that influenced surface runoff and the availability of soil organic matter (SOM) in the bamboo-based agroforestry in East Lombok. Research was done from March 2010 to March 2011 in Lenek Daya village, Aikmel sub-district, East Lombok district. The research plots were located on slopes of 0-15o, 30-45o, and 45-65o; with bamboo canopy closures of 0-25%, 25-50%, 50-75%, and over 75%. The research involving 12 plots, each in 4 x 12 m size. Measurements included surface runoff, bamboo canopy closure, weeds and bamboo leaves litter weight, rainfall depth and duration, dissolved sediment, and soil physical and chemical properties as well as SOM. Correlation and multiple linear regression tests were used in data analysis. The results of the regression tests showed a change in surface runoff which was influenced by changes in bamboo canopy closure, rain duration, rain intensity and soil sand fraction, each by -0.019, 0.418, 0.049 and -0.065 respectively. Rain duration was the highest influencing variable, whereas bamboo canopy closure significantly decreased surface runoff. Bamboo canopy closure had no correlation with the increase of SOM. But, the increase of SOM had correlation with the increase of  soil cation exchange capacity (CEC). The positive impact of  bamboo canopy closure  on  Regosol soil fertility in  bamboo-based  agroforestry land  was determined  by  land management intensity which could increase the availability of SOM and decrease phosphorus element loss due to leaching of nutrient.
机译：竹子制剂适用于营养素不佳的土壤。竹子的特点和冠层的快速封闭，改善土壤覆盖，土壤养分可用性和土壤水分含量，防止降低表面径流侵蚀。该研究旨在确定在东龙木病的竹子型制剂中影响表面径流的因素和土壤有机物（SOM）的可用性。研究是从2010年3月到2011年3月在East Lombok区Aikmel Sub区的莱提克大村村。研究情节位于0-150，30-450和45-65O的斜坡上;竹冠盖封闭0-25％，25-50％，50-75％，超过75％。涉及12个曲线的研究，每个尺寸为4 x 12米。测量包括表面径流，竹冠闭合，杂草和竹子窝夹重量，降雨量深度和持续时间，溶解沉积物和土壤物理和化学性质以及SOM。数据分析中使用相关性和多元线性回归测试。回归测试的结果表明，表面径流的变化，受竹冠闭合，雨持续时间，雨强度和土壤砂馏分的变化的影响，分别为-0.019,0.418,0.049和-0.065。雨持续时间是影响变量最高的变量，而竹冠层封闭显着降低了表面径流。竹冠闭合与SOM的增加无关。但是，索兰的增加与土壤阳离子交换能力（CEC）的增加具有相关性。竹冠层闭合对竹子植物植物植物的积极影响是由土地管理强度确定的，这可能会增加索华渣的可用性，降低营养素的浸出引起的磷元素损失。

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    Cecep Handoko;

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  • 年度 2012
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