稻草还田和不同耕作方式对直播稻田土壤理化性状及?经济效益的影响  

Effects of Straw Returning and Different Tillage Methods on Soil Physical and Chemical Properties and Economic Benefits of Direct Seeding Paddy Field

作　　者：白应刚 王静 周韦 张黎 BAI Ying-gang;WANG Jing;ZHOU Wei;ZHANG Li(Xiangxi Agricultural Technology Extension Station, Jishou 416000, PRC)

机构地区：[1]湘西州农业技术推广站

出　　处：《湖南农业科学》2019年第6期15-17,共3页Hunan Agricultural Sciences

摘　　要：通过2a的田间定位试验,研究了稻草还田结合不同耕作方式对直播稻田土壤的紧实度、容重、孔隙度、有机质含量、养分含量及水稻经济效益的影响.结果表明:稻草还田在一定程度上能改善土壤结构、提高土壤养分含量并增加水稻产量;稻草还田条件相同时,免耕使土壤紧实度和容重有所增加,但土壤有机质和养分含量高于翻耕处理,有一定保肥的作用;免耕虽然对水稻产量极其构成因素影响不显著,但由于节省了翻耕成本,经济效益得到了提升.因此,稻草还田结合免耕能取得良好的经济效益和生态效益,值得在湘西山地稻区推广.The effects of straw returning and different tillage methods on soil compactness, bulk density, porosity, organic matter content, nutrient content and economic benefit of rice in direct seeding paddy field were studied through a two-year field positioning experiment. The results showed that straw returning could improve soil structure, increase soil nutrient content and rice yield to a certain extent. Under the same conditions, no-tillage increased soil compactness and bulk density, but the content of soil organic matter and nutrients was higher than that of tillage treatment, which had a certain role in fertilizer conservation. Although no-tillage had no significant impact on rice yield, its economic benefits were improved because of the saving of tillage costs. The combination of straw returning and no-tillage can achieve good economic and ecological benefits, which is worth popularizing in the western Hunan mountainous rice region.

关 键 词：水稻 稻草还田 耕作方式 土壤理化性状 经济效益 

分 类 号：S518[农业科学—作物学]