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首页> 外文会议>Second International Conference on Sustainable Agriculture for Food, Energy and Industry Vol.2 >Content of True Humic Substances and Detritus after Different Times of Ploughing in Soil
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Content of True Humic Substances and Detritus after Different Times of Ploughing in Soil

机译：不同耕作时期土壤中真腐殖质和碎屑的含量

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There are relatively few studies on the nature of the organic compounds which are subject to mineralization. This made necessary during the 1997 -1998 period at the Forage Institute - Pleven to carry out a study for the determination of true humus substances, detritus and changes of humus group compositions at different times of ploughing up of surface soil layer of typical chernozem. The areas ploughed up had been used as a fields for 20, 70 and over 100 years. A virgin land was used for comparison. Winter cereals with dense surface and spring tilling crops had been mainly grown. The difference in the amount of organic substance for the virgin land and analogues ploughed up is due to detritus mineraliztion. When determining the detritus 20% to 1% of low-molecular compounds of the type of fulvoacids are extracted (r = 0.96). The content of true humus substances for the virgin land (0.79%), as well as for the analogues ploughed up (0.77%) is a cnstant value. The substances extracted from the soil by alkaline solvents and weak organic acids are low-molecular intermediate compounds of equal or similar nature not having entered yet into the process of humus formation (r = 0.93) There are relatively few studies on the nature of the organic compounds which are subject to mineraliztion. It is known that during the first 20-30 years after ploughing up of the virgin land the organic matter content sharply decreases (Grinchenko, 1970; Chesniak, 1983; Orlov et al., 1996). The objective is to establish the content of true humus substances and detritus and the changes of humus group composition under different times of ploughing up of surface soil layer.
机译：关于矿化的有机化合物的性质的研究相对较少。在1997年-1998年期间，这在Pleven饲料研究所进行了一项研究，以测定典型黑钙土表层土壤耕作的不同时间的真实腐殖质物质，碎屑和腐殖质族组成的变化。耕作过的土地已被用作田地20年，70年和100多年。使用原始土地进行比较。主要种植了地表致密的冬季谷物和春季耕作作物。耕作的原始土地和类似物的有机物含量差异是由于碎屑矿化。确定碎屑时，会提取出20％至1％的黄腐酸类型的低分子化合物（r = 0.96）。原始土地中腐殖质的真实含量（0.79％）以及耕作的类似物的腐殖质含量（0.77％）是一个未知数。通过碱性溶剂和弱有机酸从土壤中提取的物质是性质相同或相似的低分子中间体化合物，尚未进入腐殖质形成过程（r = 0.93）。关于有机物性质的研究相对较少。易矿化的化合物。众所周知，在原始土地耕作后的前20-30年中，有机质含量急剧下降（Grinchenko，1970； Chesniak，1983； Orlov等，1996）。目的是确定表土层不同翻耕时期腐殖质和腐殖质的含量以及腐殖质组成的变化。

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