川东丘陵区青花椒种植对土壤肥力的影响

发布时间：2018-04-18 01:23

本文选题：土壤肥力 + 种植年限　；参考：《长江流域资源与环境》2017年10期

【摘要】：以川东丘陵区退耕青花椒林、弃耕地和农耕地为研究对象,对青花椒林分(2 a、5 a、9 a和14 a,分别以QHJ2、QHJ5、QHJ9和QHJ14表示)及对照农耕地(CK)和弃耕地(14 a,QGD)土壤物理性质、养分含量、微生物数量和酶活性进行研究,并利用隶属函数法对土壤肥力进行综合评价,探究青花椒不同种植年限对土壤肥力特征的影响,以指导青花椒种植和培肥改土。结果表明:青花椒林和弃耕地的土壤持水量、孔隙度、养分含量、微生物数量和酶活性均为高于CK,且随青花椒种植年限的增加而增加;相反,花椒林和弃耕地的土壤容重低于CK,且逐渐随青花椒种植年限的增加而降低。土壤肥力综合值呈QHJ14QHJ9QGDQHJ5QHJ2CK的变化规律,林地均显著高于农耕地,QGD与QHJ14差异显著而与QHJ9差异不显著;土壤肥力综合值与土壤物理性质、养分含量、酶活性和微生物数量呈显著相关(P0.05)。说明种植青花椒具有显著的培肥效应,对于提高川东丘陵区土壤肥力和促进农民增收致富具有重要作用,土壤肥力综合值能综合反应土壤肥力高低差异。
[Abstract]:The soil physical properties and nutrient contents of green pepper forest, abandoned farmland and agricultural land in hilly area of East Sichuan were studied. The soil physical properties and nutrient content of green pepper stand were studied in terms of QHJ2QHJ5QHJ9 and QHJ14, respectively. The soil physical properties and nutrient content of abandoned land were compared with CK (CK) and abandoned farmland (14aQGD).The microorganism quantity and enzyme activity were studied, and the comprehensive evaluation of soil fertility was carried out by using membership function method. The effects of different planting years of green pepper on soil fertility characteristics were explored to guide the cultivation of green pepper and to improve soil fertility.The results showed that the soil water holding capacity, porosity, nutrient content, microbial quantity and enzyme activity of green pepper forest and abandoned land were higher than that of CK, and increased with the increase of planting years of green pepper.The soil bulk density of Zanthoxylum bungeanum forest and abandoned farmland was lower than that of CK, and gradually decreased with the increase of green pepper planting years.The comprehensive value of soil fertility showed the law of QHJ14QHJ9QGDQHJ5QHJ2CK, the difference of forest land was significantly higher than that of agricultural land and QHJ14, but had no significant difference with QHJ9, and the comprehensive value of soil fertility and soil physical properties, nutrient content, enzyme activity and microbial quantity were significantly correlated with P0.05.The results showed that planting green pepper had significant fertilization effect, which played an important role in improving soil fertility and increasing farmers' income in hilly areas of East Sichuan, and the comprehensive value of soil fertility could comprehensively reflect the difference of soil fertility.
【作者单位】：四川农业大学林学院林业生态工程四川省重点实验室;
【基金】：国家科技支撑计划项目(2001BA606A-06;2006BAC01A11;2011BAC09B05) 四川省农作物育种攻关项目(2006YZGG-10;2011NZ0098-10;2016NYZ0035) 四川省农业科技成果转化项目(16NZ0067)~~
【分类号】：S158;S573.9

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