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长期施有机肥对耕地棕壤团聚体及钙素分布的影响
引用本文:张大庚,王觊琼,栗 杰,刘 慧,李双异,汪景宽.长期施有机肥对耕地棕壤团聚体及钙素分布的影响[J].水土保持学报,2017,31(4):154-158.
作者姓名:张大庚  王觊琼  栗 杰  刘 慧  李双异  汪景宽
作者单位:沈阳农业大学土地与环境学院,辽宁,110866
基金项目:国家自然科学基金项目(41401323),辽宁省自然科学基金项目(2014027010)
摘    要:为了探明施有机肥对耕地棕壤团聚体及钙素分布的影响,以长期定位施肥近30年的耕地棕壤为研究对象,采用干筛法进行土壤团聚体分级,系统研究了单施有机肥及有机肥配施氮磷肥对耕地棕壤团聚体及不同形态钙素分布的影响。结果表明:与不施肥对照相比,施有机肥可增加1~2mm粒级团聚体含量,且随有机肥施入量的增加而增加,最高增加了66.68%;与单施有机肥相比,配施氮磷肥则降低了1~2mm粒级团聚体含量;与对照相比,单施及配施有机肥均降低了0.25~1 mm粒级团聚体含量,降幅最高达15.20%。单施及配施有机肥均提高了全土的全钙含量,其中单施高于配施,最高为施高量有机肥处理,增幅达11.67%;单施有机肥处理以1~2 mm粒级团聚体的全钙含量最高,配施氮磷肥后以0.053~0.25mm的最高;与对照相比,单施及配施有机肥均增加了各粒级团聚体水溶性钙含量;单施有机肥提高了土壤交换性钙含量,配施氮磷肥却相反;单施及配施有机肥处理均增加了全土酸溶性钙含量。相关性分析显示,耕地棕壤各级团聚体的全钙含量是影响各形态钙素分布的重要因素。因此,长期施有机肥不仅增加了耕地棕壤较大粒级团聚体含量,且可增加较大粒级团聚体的钙素含量。

关 键 词:有机肥  耕地棕壤  团聚体  钙素

Effects of Long-term Organic Fertilizer Application on the Calcium Distribution and Aggregate in the Cultivated Brown Soil
ZHANG Dageng,WANG Jiqiong,LI Jie,LIU Hui,LI Shuangyi,WANG Jingkuan.Effects of Long-term Organic Fertilizer Application on the Calcium Distribution and Aggregate in the Cultivated Brown Soil[J].Journal of Soil and Water Conservation,2017,31(4):154-158.
Authors:ZHANG Dageng  WANG Jiqiong  LI Jie  LIU Hui  LI Shuangyi  WANG Jingkuan
Institution:Land and Environment College, Shenyang Agricultural University, Liaoning 110866
Abstract:In order to determine the effect of organic fertilizer application on the calcium distribution and aggregate in cultivated brown soil,the field cultivated brown soil fertilized for nearly 30 years was taken as study object.The soil aggregate was classified by dry sieve method,while the effect of single and combined application of organic fertilizer on the distribution of different calcium forms was analyzed.The results showed that the single application of organic fertilizer could increase 1 ~ 2 mm graded aggregate content compared with control,the increment increased with the amount of organic fertilizer and could reach 66.68%.Combined nitrogen and phosphorus fertilizer application reduced 1~2 mm graded aggregate content compared with the single application of organic fertilizer.The single application and combined nitrogen and phosphorus fertilizer application decreased 0.25 ~ 1 mm graded aggregate content compared with control,while the highest decrease was 15.20%.The single application and combined nitrogen and phosphorus fertilizer application increased total calcium content in soil.The calcium content of the single application of organic fertilizer was higher than that of combined nitrogen and phosphorus fertilizer application.The highest increment of calcium (11.67 %) was the treatment received higher organic fertilizer application.The highest total calcium content was in the 1~ 2 mm graded aggregate of the treatment received single organic fertilizer,while the highest total calcium content was in the 0.053~0.25 mm graded aggregate of treatment received combined nitrogen and phosphorus fertilizer.The single organic fertilizer and combined nitrogen and phosphorus fertilizer application increased water-soluble calcium content in each graded aggregate.The single application of organic fertilizer improved exchangeable calcium content in soil,while the trend was reversed when combined nitrogen and phosphorus fertilizer was applied.The single application of organic fertilizer and combined nitrogen and phosphorus fertilizer all increased acid soluble calcium content in soil.Correlation analysis indicated that the total calcium content in each aggregate grade was the key factor effects the distribution of the various forms of calcitonin.Therefore,long-term organic fertilizer application not only increased the larger grade aggregate content in soil,but also enhanced the calcium content in larger aggregate.
Keywords:organic fertilizer  cultivated brown soil  aggregate  calcium
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