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在高肥力植烟土壤上研究施用C/N高的小麦秸秆对土壤理化性状的影响。结果表明 :在烟株上、中、下部叶成熟期等 3个生育期 ,不同施氮水平下加秸秆处理可明显提高土壤 0 .2 5～ 10mm水稳性团粒数量 ,降低小于 0 .2 5mm小团粒数量 ,显著增加土壤水分含量 ,提高土壤 pH。同时 ,施用秸秆可显著降低烟株不同成熟期土壤中NH4 N和NO3 N含量 ,还使土壤有效钾明显上升 ,土壤P、Ca、Mg明显下降 ,S及B、Cu、Zn、Fe、Mn等元素有升高趋势。可见 ,高肥力植烟土壤上施用C/N比高的秸秆可以调控土壤养分供应 ,改善土壤理化性质。
Effects of applying C / N wheat straw on soil physical and chemical properties under high fertility tobacco soil. The results showed that in the three growth stages of upper, middle and lower leaf maturity stages of tobacco plants, the application of straw under different nitrogen application rates could significantly increase the quantity of water-stable pellets from 0. 25 ~ 10 mm and decrease less than 0.2 mm Small amount of pellets, significantly increase the soil moisture content, improve soil pH. At the same time, application of straw can significantly reduce the contents of NH4N and NO3N in soils at different mature stages, but also increase the available potassium, P, Ca, Mg, S, B, Cu, Zn, Fe and Mn Elemental upward trend. It can be seen that the application of straw with high C / N ratio on high fertility tobacco soil can control the supply of soil nutrients and improve the physical and chemical properties of soil.