山毛豆在岩溶区石漠化治理中的作用

为探讨山毛豆对岩溶区石漠化治理的作用,在广西凌云县典型的石漠化治理示范点阁楼村和加尤镇,在椿树和板栗树林下种植山毛豆和合萌,以坡地种植山毛豆作对照,通过定点监测植被多样性和土壤中养分的变化情况。结果显示,岩溶区种植山毛豆后第1年,植被盖度达到20%~70%,第2年提高到95%~100%,水涵养性提高了3.85%~10.3%,野生物种有害数减少20%~30.7%,土壤有效氮提高6.14%~14.61%,全磷提高23.02%~51.66%,全钾提高38.10%~45.24%,有机质提高6.28%;86.7%的区域土壤有机质属于中等及以上等级,必需微量元素Cu、Mn、Ni、Mo、Sn等有益元素得到提...

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Published in广东农业科学 Vol. 43; no. 11; pp. 78 - 85
Main Author 蔡小艳 邓素媛 赖志强 陈远荣 易显凤 姚娜 韦锦益
Format Journal Article
LanguageChinese
Published 广西壮族自治区畜牧研究所,广西南宁,530001%桂林矿产地质研究院,广西桂林,541004 2016
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Summary:为探讨山毛豆对岩溶区石漠化治理的作用,在广西凌云县典型的石漠化治理示范点阁楼村和加尤镇,在椿树和板栗树林下种植山毛豆和合萌,以坡地种植山毛豆作对照,通过定点监测植被多样性和土壤中养分的变化情况。结果显示,岩溶区种植山毛豆后第1年,植被盖度达到20%~70%,第2年提高到95%~100%,水涵养性提高了3.85%~10.3%,野生物种有害数减少20%~30.7%,土壤有效氮提高6.14%~14.61%,全磷提高23.02%~51.66%,全钾提高38.10%~45.24%,有机质提高6.28%;86.7%的区域土壤有机质属于中等及以上等级,必需微量元素Cu、Mn、Ni、Mo、Sn等有益元素得到提高,有害金属元素中除了Cr外Pb、Ag、As、Hg等均明显减少,其中Hg由原来的三级标准提高到二级标准;阁楼对照区土壤pH值第2年比第1年降低6.47%~10.59%,而山毛豆种植区提高0.40%~6.63%。表明种植山毛豆可以提高石漠化地区植被盖度,提高土壤水涵养性、有效氮和pH值,可以减少野生有害物种的数量和土壤中有害金属元素的含量,具有强大的保持水土和恢复生态环境的作用,可促进石漠化地区土壤和植被正向恢复的演替。
Bibliography:44-1267/S
CAI Xiao-yan1, DENG Su-yuan1, LAI Zhi-qiang1, CHEN Yuan-rong2, YI Xian-feng1, YAO Na1, WEI Jin-yi1 ( 1. Guangxi Institute of Animal Sciences, Nanning 530001, China ; 2. Guilin Research Institute of Geology for Mineral Resources, Guilin 541004, China )
Tephrosia candida DC.; rocky desertification; soil nutrients; trace elements; environmentalquality
In order to understand the role of Tephrosia candida DC. in rocky desertification management in Karst areas, we conducted the program in Gelou village and Jiayou town, typical pilot sites of rocky desertification management in Guangxi, planted T. candida and Aeschynomene indica L. under Cedrela wood and Chestnut wood, while planted T. candida on slope as control group, and detected the vegetation diversity and changes in soil nutrients. The results showed that, by planting T. candida in Karst areas, the vegetation coverage reached 20%-70% in the first year, and increased to 95%-100% in the second year; water conservation increased by 3.85%-10.3%; harmful wil
ISSN:1004-874X
DOI:10.16768/j.issn.1004-874X.2016.11.012