摘要
本文通过对温孟滩移民区64个不同质地土壤样品的分析指出:土壤中的速效钾、有机质、土壤pH 以及土壤有效水含量等性状与土壤中的物理性粘粒含量有密切的相关关系。随着土壤中物理性粘粒含量的增加,土壤速效钾、有机质含量增加,土壤 pH 则下降;土壤中的有效水含量在物理性粘粒含量60%左右时最高。土壤中的全氮、速效氮、全磷等含量与土壤中的物理性粘粒含量没有明显的线性相关关系;但当土壤中物理性粘粒含量低于10%时,土壤中的各种养分性状都明显恶化;当土壤中物理性粘粒含量超过70%时,土壤的通气孔隙将低于10%。在温孟滩区所进行的工程改土中,应以土壤中物理性粘粒含量在10%～70%为宜。
Analyese were made of 64 soil sampes from different textur in Wenmengtan re- settlement area.The result indicate that effective potassium,organic matter content,pH and available water content were closely correlated with physical clay particle content.As physical clay particle content increase,the effective potassium and organic matter content increases,but pH decreases.The available water content reaches its maximum at the 60% of the physical clay particle content.Total nitrogen,effective nitrogen and total phospho- rus are not correlat significantly with physical clay particle content.While the physical clay particle content is lower than 10%,all nutrient elements became significantly poor. The soil airy aperture reduces less than 10% when physical clay particle content is inore than 70%.Therefore,appropriate physical clay particle content ranges from.10% to 70% in soil improvement project in Wenmengtan.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
1997年第S1期92-97,共6页
Journal of China Agricultural University
关键词
移民安置区
土壤质地
土壤肥力
相关性
resettlement area
soil texture
soil fertility
relativity
