稻草覆盖对土壤理化性状和烤烟产量及品质的影响

在湖南永州对稻草翻压、稻草覆盖、地膜覆盖、不还田不覆盖进行了连续3年定位试验。结果表明，两种稻草还田方式均能改善土壤结构，稻草覆盖比稻草翻压的改土效果更为明显；稻草覆盖在烤烟生根期的保温作用不如地膜覆盖，烤烟进入旺长期以后，稻草覆盖土壤温、湿度变幅较小，能够维持相对适宜的温、湿度状况，而地膜覆盖及裸栽处理的烤烟整个生育期土壤温、湿度变幅较大，不利于烤烟生长。稻草覆盖比稻草翻压及地膜覆盖更有利于烤烟产量及品质的提高。

The effect of straw mulching on soil properties of physics and chemistry and on quantity and quality of flue-cured tobacco

In Yongzhou of Hunan, with fixed position plot trials, straw mulching, film mulching, no mulching and no returning had been compared for series three years. The result showed that, two ways of straw returned to field improved the structure propelty of soil, yet the effect of treatment with straw mulching on soil structure property was better than the treatment with straw returned to field directly. After the rosette stage of tobacco, the temperature - humidity change range of soil was little. However, the temperature- humidity change range of soil was great and maked against growth of flue - cured tobacco with else treatment during whole procreating stage. The quantity and quality of tobacco was better with straw mulching.