欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
通过综合分析不同施肥制度下土壤物理、化学、生物学特征来评价不同施肥体系培肥土壤能力,以期建立科学施肥制度,为实现土壤可持续利用提供理论依据。以位于中国农业科学院禹城试验基地长达26 a的不同施肥定位试验为平台,研究了长期不同施肥对2种土壤物理肥力指标、10种化学肥力指标及2种土壤生物肥力指标的影响,运用主成分分析和聚类分析等数理统计方法综合评价了长期不同施肥制度下土壤物理肥力、化学肥力及生物肥力因子,并对不同施肥制度土壤肥力水平进行综合评分。结果表明：1）不同施肥制度对土壤肥力因子影响差异显著。单施有机肥及有机无机配施与单施化肥相比,土壤容重降低5.0%-11.0%,土壤总孔隙度增加4.1%-9.9%：土壤有机碳、全氮增加95%-136%、69%-137%,土壤速效磷含量增加5倍,土壤速效钾增加81%-103%;土壤微生物碳、氮分别增加50%-112%、34%-79%,土壤pH值下降了0.15-0.47个单位。2）将14个土壤肥力因子分为2个主成分综合表征土壤肥力,其中土壤容重、土壤孔隙度、土壤全碳、土壤活性有机碳、土壤全氮、土壤有机氮、土壤微生物碳、土壤微生物氮、土壤速效钾、土壤全磷、土壤速效磷、土壤有机磷、pH值等肥力因子在主成分一上有较高的负荷,贡献率83.73%;土壤全钾在主成分二上有较高的负荷,贡献率8.49%。3）聚类分析方法把不同施肥制度对土壤肥力的影响差异强度分为4类：常量有机肥和常量有机无机配施、常量化肥和高量化肥、不施肥、高量有机肥。4）不同施肥制度对土壤培肥效果依次表现为：高量有机肥〉常量有机肥〉常量有机无机配施〉高量化肥〉常量化肥〉不施肥。单施有机肥以及有机无机肥配施与单施化肥相比能有效增加土壤养分含量,调节土壤养分平衡,能从土壤物理、化学、生物肥力方面综合提升土壤肥力水
英文摘要：
Soil fertility is a typical index to evaluate the soil ability of supplying the proper conditions for plant growth. This study focused on the differences among soil physical, chemical, and biological properties under different long-term fertilization strategies and the results of those properties were analyzed synthetically to establish the suitable fertilization strategy to improve soil fertility. A 26 years long-term experiment was conducted in the Dezhou station of Chinese Academy of Agriculture Sciences. Six treatments included no fertilizer and manure （CK）, half conventional dosage of organic manure and half of chemical fertilizer （MF）, conventional dosage of organic manure （CM）, conventional dosage of chemical fertilizer （CF）, and high dosage of organic manure （HM） and high dosage of chemical fertilizer （HF）. The indicators of soil physical, chemical and biological characteristics under the different fertilization treatments were determined to clarify the effects of fertilization on soil fertility. Principal component and cluster analyses were applied to get a comprehensive assessment on the effects of different fertilization strategies on soil fertility. The results showed that： 1） The significant differences of soil properties were found among the fertilization treatments. Compared with chemical fertilizer, long-term application of organic manure or combination of organic and inorganic fertilizers reduced soil bulk density by 5.0% - 11.0%, and increased soil total porosity by 4.1% - 9.9%, increased soil organic carbon, total nitrogen, available phosphorus and available potassium by 95% - 136%, 69% - 137%, 500%, and 81% - 103%, respectively. In addition, the soil pH in the treatments of organic manure or combination of organic and inorganic fertilizer was lower than that of chemical fertilizer treatments by 0.15-0.47. 2） According to principal component analysis, soil fertility indexes could be classified into two principal components. The first component （PC1） consisted o
同期刊论文项目
同项目期刊论文
期刊信息
位置：