| 张雯,丛巍巍,赵洪亮,衣莹,侯立白.免耕条件下玉米残茬处理对农田表层土壤结构性能的影响[J].干旱地区农业研究,2010,28(3):79~82 |
| 免耕条件下玉米残茬处理对农田表层土壤结构性能的影响 |
| Effects of no-tllage with different corn stubble treatments ontopsoil structure properties |
| |
| DOI：10.7606/j.issn.1000-7601.2010.03.14 |
| 中文关键词: 免耕 玉米残茬处理 表层土壤结构 土壤团聚体 |
| 英文关键词:no tillage corn stubble treatment topsoil structure soil aggregate |
| 基金项目:辽宁省教育厅项目资助(2008649) |
|
| 摘要点击次数: 251 |
| 全文下载次数: 143 |
| 中文摘要: |
| 立足于东北冷凉风沙区采用的玉米垄作免耕方式,通过始于2003年的彰武县保护性耕作定点试验,比较研究留茬、覆盖和灭茬3种不同玉米残茬处理方式对农田表层(0~30 cm)土壤结构性能的影响。研究结果表明,覆盖处理在改善土壤结构性能方面效果最明显。在0~10 cm、0~20 cm和20~30 cm土层中,>0.25 mm水稳性团聚体含量和团聚体稳定率均为覆盖>留茬>灭茬,且均随土壤深度增加而减小。在不同土层中,土壤容重表现为灭茬>留茬>覆盖,土壤总孔隙度呈现出覆盖>留茬>灭茬,且随着耕层加深,呈递减趋势。在不同土层中,覆盖处理的砂粒含量均低于留茬和灭茬处理,但随着耕层加深,各处理黏粒含量未呈现规律性变化。 |
| 英文摘要: |
| Based on no-tillage with ridge way of corn in cold, windy and sandy areas in Northeast China, through the fixed-point experiment of conservation tillage in Zhangwu County from 2003, the effects on topsoil (0~30 cm) struc-
ture properties under three different kinds of corn stubble treatments of stubble mulch(SM), stubble coverage(SC) and Elimination of stubble(ES) were studied comparatively. The results showed that the treatment of SC to improve the soil structure properties was performed obviously. On the soil layers of 0~10 cm, 10~20 cm and 20~30 cm, >0.25 mm water stable aggregate content and aggregate stability were SC>SM>ES, and they decreased with the soil depth increas-ing. In different soil layers, soil bulk density showed ES>SM>SC, soil total porosity showed SC>SM>ES, and it
showed a decreasing trend with the deepening of topsoil. In different soil layers, the sand content of SC was less than that of SM and ES, but with topsoil getting deeper, the clay content of each treatment showed no regular change. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |