水土保持学报2013，Vol.27Issue(3)：278-283,6.
果园土壤中结合态腐殖质组成特征
Composition Characteristic of Combined Humus in Orchards Soils
摘要
Abstract
By a chemical method,the composition characteristic of combined humus of cultivated soil in applepear orchards was studied in Yanbian region of Jilin province.The results were summarized as follows:(1) The content of loosely-combined humus in orchards soil was higher than 42.16 ％ of wasteland in A1 layer soil(0-22 cm),two kinds of soils were decreased by 60.79％ and 36.45％ respectively in A2 layer(22-53cm),and it had obvious supergene-enrichment phenomenon in A1 layer.In the A1,A2 layer,the content of loosely-combined fulvic acid(FA) in orchards soil was less than that in wasteland soil,the ratio of HA to FA in orchards soil was significantly higher than that in wasteland soil.(2) The content of stably-combined humus in orchards soil was decreased continuously with the increasing soil depth,but it was increased first,and then decreased,increased again in wastelands soil.In the A1,A2 layer,the content of stably-combined fulvic acid(FA) in orchards soil was less than that in wasteland soil.It showed an increased-decreasedincreased trend in orchards soil with the increasing soil depth.The content of stably-combined humic acid (HA) in orchards soil was decreased continuously with the increasing soil depth,and the content of A2 layer in orchards soil was much smaller than that in wasteland soil.In A2 layer,HA/FA of stably-combined humus in orchards soil was smaller than that in wasteland soil.(3)The contents of tightly-combined humus decreased continuously with the increasing soil depth in two types of soil.The content of A1 layer in orchards soil was much smaller than that in wasteland soil,and it was opposite in A2 layer.(4)In A1 layer,the relative content of the loosely-combined humus in orchards soil was higher than that in wasteland soil,and it was opposite in A2 layer.In the A1,A2 layer,the relative content of stably-combined humus in orchards soil was smaller than that in wasteland soil,the relative content of tightly-combined humus approached in two types of soil.In the orchards soil,the relative content of loosely-combined humus was A1 ＞A2,the relative content of stably-combined humus was A1 ＜A2.In the orchards soil,the ratio of looselycombined humus to tightly-combined humus showed orchards soil ＞wasteland soil in A1 layer； and it was opposite in A2 layer.The ratio of the combined humus(loosely,stably and tightly) was 3.4 ∶ 2.0 ∶ 4.6 in A1 layer,and 2.1 ∶ 3.2 ∶ 4.7 in A2 layer.关键词
果园土壤/结合态腐殖质/组成特征Key words
orchards soil/ combined humus/ composition characteristic分类
农业科技引用本文复制引用
刘文利,付民杰,梁运江,吴景贵..果园土壤中结合态腐殖质组成特征[J].水土保持学报,2013,27(3):278-283,6.基金项目
国家自然科学基金项目(31160103) （31160103）
国家科技支撑计划项目"松辽平原区农牧结合循环生产技术集成研究与示范项目"(2012BAD14B05,2007BAD89B06) （2012BAD14B05,2007BAD89B06）
现代农业(肉牛)产业技术体系专项经费资助项目(CARS-38) （肉牛）
