长期施用不同肥料的土壤有机氮组分变化特征

被引：75

作者：

张玉树 ^{[1
,2
]}

丁洪 ^{[1
]}

王飞 ^{[1
]}

郑祥洲 ^{[1
]}

翁伯琦 ^{[1
]}

林诚 ^{[1
]}

张晶 ^{[1
]}

机构：

[1] 福建省农业科学院土壤肥料研究所

[2] 南京师范大学地理科学学院

来源：

农业环境科学学报 | 2014年 / 33卷 / 10期

关键词：

长期定位试验; 施肥; 有机氮组分;

D O I：

暂无

中图分类号：

S158 [土壤肥力（土壤肥沃性）];

学科分类号：

090301 [土壤学];

摘要：

采用Bremner有机氮分级方法研究了30年施用不同肥料的长期定位试验耕层土壤有机氮组分变化特征。结果表明,与不施肥(CK)处理相比,长期施用不同肥料均提高了耕层土壤全氮和有机氮含量,所增加的有机氮中酸解性氮和非酸解性氮各占一半左右,其中增加的酸解性氮有69.0%为未知态氮,21.0%为氨基酸氮,6.6%为氨基糖氮,3.4%为氨态氮。与单施化肥(NPK)相比,牛粪/稻草与化肥配施能进一步提高土壤全氮和有机氮含量,但是不同种类的有机肥与化肥配施所增加有机氮的组分有明显差异;其中牛粪与化肥配施处理(NPKM)所增加的有机氮有60.0%为酸解性氮,而稻草与化肥配施处理(NPKS)中所增加的有机氮有71.7%为非酸解性氮。牛粪与化肥长期配施有利于提高土壤酸解性氮含量,而稻草与化肥配施则有利于提高非酸解性氮含量。

引用

页码：1981 / 1986

页数：6

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