摘要
通过田间试验和室内分析,研究了施用不同有机物料对渭北旱塬耕地土壤化学性质和酶活性的影响,选取有机质等10个能够反映土壤肥力质量特性的定量因子作为评价指标,采用因子分析对土壤肥力质量进行综合评分,然后用欧氏距离最短距离法对其进行聚类,最后利用作物产量结果进行验证.结果表明:通过土壤有机培肥,土壤肥力质量和作物产量均有显著提高,与单施化肥相比,施加秸秆堆肥和厩肥处理的小麦产量分别提高了20.43%和22.38%;对土壤肥力综合进行评价,秸秆堆肥配施化肥的土壤肥力质量最高,综合得分达56.53,厩肥配施化肥较高,高量秸秆配施化肥次之.可见,通过秸秆堆肥或厩肥配施化肥进行培肥土壤,能显著提高土壤肥力水平,从而提高作物产量;利用有机质等10项土壤肥力特性因子,采用因子分析对土壤肥力质量进行综合评价,能够准确反映土壤肥力水平,预测土壤生产力状况.
A comprehensive evaluation was made on the effects of applying different organic materials on the soil chemical properties and enzyme activities in Weibei rainfed highland,based on field experiment and laboratory analysis.A total of ten quantitative indices were selected,and factor analysis and minimum Euclidean distance method were employed to evaluate the overall soil fertility.Crop yield was used to verify the evaluation results.Applying organic materials promoted soil fertility and crop yield significantly.Compared with applying chemical fertilizer alone,its combina-tion with straw compost and with organic manure increased the wheat yield by 20.43% and 22.38%,respectively.The soil quality under the combined application of chemical fertilizer with straw compost was the highest,with an integrated score up to 56.53,followed by the combined application of chemical fertilizer with organic manure,and of chemical fertilizer with high amount straw.Therefore,a combined application of chemical fertilizer with straw compost or organic manure could improve the soil fertility significantly,and thereby,increase the crop yield.Using the selected 10 factors and factor analysis to evaluate the quality of soil fertility could accurately reflect the soil fertility level,and predict the soil productivity in the highland.
出处
《应用生态学报》
CAS
CSCD
北大核心
2010年第4期930-936,共7页
Chinese Journal of Applied Ecology
基金
国家科技支撑计划项目(2006BAD05B07)资助
关键词
有机培肥
土壤肥力
因子分析
聚类分析
building up fertility with organic materials
soil fertility
factor analysis
cluster analysis.
