稻草还田对烟田速效养分变化及烟叶产量品质的影响

摘要 连续两年稻草还田试验结果表明，其稻草翻压、覆盖对改良土壤和提高烟叶产量效果明显。稻草还田的土壤速效氮磷钾养分释放量高于对照。总的趋势以稻草翻压＞稻草覆盖＞CK。稻草翻压比对照平均增产12.0%，稻草覆盖比对照平均增产6.7%。且烟叶内在成分基本趋向合理，上、中等烟叶比例达90%以上。

Straw also Available Nutrient-changes in the Tobacco Fields and Tobacco Yield and Quality

Hunan Province in the southern part of high-quality tobacco leaf production to improve soil fertility and technology research system,from 2006 to 2007,two years in a row of straw to field selection method to study the soil,fertility and raise tobacco production,quality,access Good results.Straw also field a simple and rich in resources.Flue-cured tobacco throughout the growing season of soil nutrients available to monitor cumulative,and nitrogen emissions,straw and covering up pressure control,respectively,compared with 3.0 percent increase,1.3 percent;release available P increased by 11.1 percent,4.9 percent;release available K increased 25.2 percent,5.7 percent.The general trend of pressure to turn rice straw> straw cover> CK,shows that the pressure is more effective than straw over the straw covering.The results of tobacco production statistics,the straw on the field to increase tobacco production results are obvious.Of these,over the straw pressure control than the average 12.0 percent increase in the production,control over the straw covering an average increase of 6.7 percent yield.And the internal components of the basic trend of tobacco reasonable,middle-leaf ratio of 90%.