稻草还田对烟田速效养分变化及烟叶产量品质的影响

在湘南地区优质烟叶生产的土壤改良与培肥技术体系研究中,2006—2007年连续两年选用稻草还田方式,研究其改良土壤、培肥地力和提高烟叶产量、品质的作用,取得良好效果。稻草还田方法简单,资源丰富。整个烤烟生长期的土壤速效养分监测累计,碱解氮释放量,稻草翻压和覆盖分别比对照增加3.0%、1.3%;速效磷释放量分别增加11.1%、4.9%;速效钾释放量分别增加25.2%、5.7%。总的趋势以稻草翻压>稻草覆盖>CK,由此可知,稻草翻压效果优于稻草覆盖。烟叶产量结果统计,稻草还田对提高烟叶产量效果显著。其中,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%.