内蒙古中部地区吨粮田土壤有机质平衡及培肥

BALANCE SOIL ORGANIC MATTER OF TON-GRAIN FIELD AND FERTILIZER IN MIDDLE INNER MONGOLIA

本文报告了内蒙古中部地区吨粮田条件下 ,不同植物物料在覆膜和不覆膜、不同时期的分解动态规律 ,并对不同 C/ N比小麦秸秆的分解规律做了深入的研究。研究表明 ,覆膜有利于地温的提高 ,前期具有增温保墒的作用 ,促进了土有机质的矿化 ,有利于植物物料的分解。调节小麦 C/ N在 90～ 30 :1范围内 ,随着 C/ N的降低 ,物料矿化速率加大 ,降低土壤有机质含量 ;而 C/ N比为 10∶ 1时有利于土壤腐殖质的形成。

The regularity of the different carbon nitrogen ratio of wheat straw resolving was studied.This article reports the dynamic regularity of the different materials of plant covered with film and uncovered with film resolving at different stage under the conditions of ton-grain field in middle Inner Mongolia.The results are as follows;Film is beneficial to the temperature of soil and improve the materials of plant to resolve,and can increase temperature and preserve moistrue of the soil at earlier stage and improves the organism to mineralize.The carbon nitrogen ratio of wheat straw is adjusted to 90～30.1,with the carbon nirogen ratio decreasing,the mineralization rate of soil organism is increased and the content of soil organic matter is decreased.It is beneficial to form the humus of soil when the carbon nitrogen ratio is 10:1.We put forward the way of balance of soil organism on ton-grain field.