摘要
[目的]为有效利用稻草作为稻茬免耕秋玉米的土壤-作物抗旱保水的生物材料提供依据。[方法]设计4个不同稻草覆盖量,依次为06、0009、0001、2 000 kg/hm2。测定不同稻草覆盖量条件下土壤温度和土壤含水量的动态变化,探讨丘陵稻作区稻茬免耕栽培秋玉米的稻草适宜施用量。[结果]试验得出,就土壤降温和保墒效应而言,覆盖稻草量在9 000~12 000 kg/hm2可达到良好的效果。[结论]稻草覆盖能显著降低高温时段10 cm以内土层的温度,降温效应随覆盖量增加而增加;同时也能明显提高高温干旱期0~10 cm表土层的水分保持能力,其效果随着覆盖量的加大而越明显。
[Objectivel The basis for effective utilization of rice straw as the biological material with rooismre-keeping and drought-resisting for auturnm com growth in the no-tillage soil was provided. [ Method] Four different amounts of straw mulch： 0,6 000,9 000 and 12 000 kg/hm2 was designed. The dynamic change of soil temperature and moisture under the different conditions were determined to explore the optimal amount of rice straw mulch for autumn corn growth in hilly area. [ Results ] The best effect on the soil temperature and moisture was the amount of coverage straw of 9 0130 - 12 000 kg/hm2. [ Conclusion] The straw cover can significantly reduce the soil temperature within 10 cm during the period of high temperature, cooling effect with coverage amoant-inereasing.At the same time it can improve the moisture retention capacity in 0 - 10 cm soil high during the period of high temperature and drought, the obvious effect with coverage amotmt-increasing.
出处
《安徽农业科学》
CAS
北大核心
2009年第7期3068-3069,3119,共3页
Journal of Anhui Agricultural Sciences
关键词
稻草覆盖
早稻茬免耕
土壤温度
土壤水分
秋玉米
Rice straw mulch
No-tillage land for early-season rice growth
Soil temperature
Soil moisture
Auturm com
