【摘要】 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。更多还原

【Abstract】 The soil physical and chemical properties were studied in fertile soil applying wheat straw with high ratio of carbon and nitrogen under the condition of cultivating flue-cured tobacco in Yuxi Yunnan Province. When 7 500 kg wheat straw was applied in 1 hm 2fertile soil planted flue-cured tobacco, the composition of water-stable aggregates, soil water and soil pH was increased more quickly,than no straw application in different development stages of tobacco at different level of nitrogen fertilizer application, such as 0, 30, and 60 kg N/hm 2. At the same time, the content of NH 4-N, NO 3-N and available K, S, B, Cu, Zn, Fe, Mn in the soil was improved, and available P, Ca, Mg was decreased.Those suggested that the application of wheat straw with high ratio of carbon and nitrogen in fertile soil might regulate the nutrients supply of soil, improve soil physical and chemical properties, be favorable to the betterment of output and quality of flue-cured tobacco.更多还原