摘要
在四川省凉山彝族自治州的西昌市海拔1500m的半山荒坡地种植系列果树，建设生态果园，以相同坡面的未开垦荒山为对照，研究生态果园建设对土壤微量元素铁，锰，铜和锌变化的影响，探索合理开发利用这些半山荒坡的农业生态模式。土壤有机质用重铬酸钾容量法-外加热法测定；铁，铜，锰和锌等微量元素用氢氟酸-高氯酸-硝酸消煮，原子吸收光谱法测定含量。结果表明：生态果园建设除锌含量与荒地没有明显差别外，铁，锰和铜的含量比荒地都有所降低。铁含量比荒地低7．6％；锰含量比荒地低24．8％；铜含量比荒地低26．9％；生态果园土壤的锌含量比全国平均水平高3～4倍，土壤不缺锌。生态果园建设对土壤微量元素状况没有负面影响，是一种保护山区生态环境和使农民增收的一条可持续发展道路。
The purpose of this study was to establish the ecological agriculture model of reasonably exploiting and utilizing the semi-mountain waste slope. The different fruit trees including plum, loquat and pomegranate with interplanting Chinese milk vetch, lucerne, triphyllous grass and black wheat,which was the base of ecological orchard construction, were cultivated in semi-mountain waste slope of 1500 m altitude above sea level, Xichang county, Liangshan Yi nationality autonomous prefecture, Sichuan province, China in 1997. The ecological orchard area is 20 hm^2 and management has been enhanced since 2002. The waste land located in the same slope side was considered as check. The effect of ecological orchard construction on soil microelements Fe, Mn, Cu and Zn was studied. Contents of these microelements were determined by AAS. Research results showed that contents of Fe, Cu and Zn in orchard soil were increased in comparison with waste slope soil except for Zn content without big difference in comparison with waste slope soil. Contents of Fe,Mn and Cu of orchard soil were 7.6 % ,24.8 % and 26. 9 % lower than waste slope soil respectively. Zn content in orchard soil was 3 -4 times higher than the average level of China,which indicated the soil studied was enough in Zn level. It was put forward that ecological orchard construction was an available way for protection of mountainous environment and increase of farmer＇s income.
出处
《西南农业学报》
CSCD
北大核心
2009年第2期385-388,共4页
Southwest China Journal of Agricultural Sciences
基金
中国科学院水利部成都山地灾害与环境研究所博士后研究基金
四川省科技攻关项目(03NG020-021)
关键词
生态果园
微量元素
铁
锰
铜
锌
Ecological orchard
Microelement
Fe
Mn
Cu
Zn
