水土保持学报2011，Vol.25Issue(6)：59-63,5.
植物篱对紫色土物理性质及养分的影响
Effects of Hedgerow on Physical Properties and Nutrients of the Purple Soil
摘要
Abstract
Through experiments in standard runoff plots, this paper studied effects of vetiver hedgerow on bulk density, particle distribution and nutrient loss in the surface soil layer (0 - 20 cm) of different slope farmland in the purple soil area, Sichuan, China. The results showed that Vetiver hedgerow could reduce soil bulk density, but the effect was not significant. Under hedgerow's effect, small soil particles (silt, clay) obviously enriched in the bottom and middle of slope, and the quantity of small particles loss reduced in the whole, so sand percentage decreased. Vetiver hedgerow could effectively control nutrient loss and maintain soil fertility; could reduce the quantity of nutrient loss in the top of slop, but the quantity of total nitrogen loss was still serious; could increase nutrient enrichment in the bottom of slope, especially organic matter; could significantly improve soil fertility in the front of hedgerow, especially total phosphorus and available potassium. Variations of organic matter, total nitrogen, total phosphorus, available potassium and available potassium had positive linear correlation with variation of clay with correlation coefficient of 0. 859, 0. 896, 0. 821, 0. 807 and 0. 927 respectively, so they had the same changing characteristics with clay in slop. In the hedgerow plots, effects of slope on organic, total nitrogen, alkali-hydrolyzable nitrogen and total potassium enrichment were not obvious, but in the gentle slope loss of available potassium, losses of alkali-hydrolyzable nitrogen and available phosphorus of slop top had significant reductions. Total potassium in different slope positions of all plots increased. Therefore, increasing the amount of nitrogenous fertilizer and reducing the a-mount of potash fertilizer were important in this area, and strengthening soil fertilities of the top of the slopand portions faraway from hedgerow were also important.关键词
香根草/植物篱/土壤容重/机械组成/土壤养分Key words
Vetiveria zizanioides/ hedgerow/ soil bulk density/ mechanical composition/ soil nutrient分类
农业科技引用本文复制引用
谌芸,马云,何丙辉..植物篱对紫色土物理性质及养分的影响[J].水土保持学报,2011,25(6):59-63,5.基金项目
国家自然科学基金(40971166) （40971166）
中央高校基本科研业务费专项资金(XDJK2010C046) （XDJK2010C046）
国家科技支撑计划项目(2011BAD31B03) （2011BAD31B03）
国家科技量大专项课题(2009ZX07101-002 06) （2009ZX07101-002 06）
西南大学生态学重点学科"211工程"三期建设项目 （）
