摘要
应用砂滤管法研究了10种常用的有机物料在哈尔滨地区黑土中的腐解状况。结果表明,各物料的腐殖化系数依次为:玉米根茬>小麦根茬>农家肥>豆根茬>豆秸>谷子根茬>玉米秸>麦秸>草木樨根茬>草木樨秸。为科学地调控土壤有机质提供理论依据,可根据不同有机物料的腐殖化系数及哈尔滨地区黑土有机质的矿化率,并以 Jenny 模型计算有机物料施用量,维持土壤有机质的平衡。
The paper studied the humification of various organic materials in black soil in the Harbin area.The humification coefficients obtained accoding to the speed of decomposition were as follows: corn roots and residues>wheat roots and residues>farm manure>soybean roots and residues>soybean straw>millet roots and residues>corn straw>wheat straw>sweet-clover straw>sweet-clover roots and residues.These results might provide some references to the reasonable application of organic materials for maintaining and in-creasing the level of soil organic matter,and to the regulation of organic matter in terra nera in the Harbin area.
关键词
土壤
有机物料
腐解
有机质
矿化率
Heilongiang province
organic materials
humification coefficient
decomposition rate
soil organic matter
mineralization
