引用本文:
DOI:10.12357/cjea.20230698
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器   关闭   
过刊浏览    高级检索
本文已被:浏览 61次   下载 25  
分享到: 微信 更多
不同机耕年限对潮土性水稻土土壤物理特性的影响研究
黄羽翔
长江大学农学院
摘要:  农业机械化作业和耕作方式是造成耕地土壤物理性质改变的重要因素。探明江汉平原潮土性水稻土区不同机耕年限下土壤物理性质变化特征对明确区域土壤质量变化趋势,合理改善耕层土壤结构、选用适宜耕作措施,促进作物增产增效有重要意义。本文以江汉平原潮土性水稻土为研究对象,采用田间原位模拟耕作试验,模拟分析了双季稻种植模式下不同耕作年限土壤物理性状的年际变化特征与趋势。结果表明:1)土壤水分指标总体随机械耕作年限延长呈降低趋势, 犁底层以下土层(20~40cm)总体平稳, 其中30~40 cm层有缓慢增大趋势。2)长期机械耕作作用下, 土壤结构稳定性随耕作年限延长呈逐渐年降低趋势,土壤团聚体结构破碎率随剖面加深有增大趋势, 土壤结构稳定性降低,水旱交替耕作是改良水稻连作障碍下 土壤结构稳定性的有效方式。土壤紧实度随剖面加深呈大幅增大后趋于缓慢降低趋势,这与长期机械作业造成犁底层增厚和上移有关。3)在长期机械耕作下,土壤抗压能力总体呈先增大后缓慢降低的趋势;先期固结压力在犁底层(10~20cm)呈现出减小趋势,而在20~40cm下层土壤呈现出增大趋势,说明土壤容重和含水量是影响土壤最大抗压能力的关键因素。研究结果可为江汉平原水稻种植区土壤质量提升和农业可持续发展改善提供参数支持和理论依据。
关键词:  机械耕作  土壤压实  土壤物理质量  耕作年限  潮土性水稻土
中图分类号:S157.4+2
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
Effects of different mechanical tillage years on soil physical properties of fluvo-aquic paddy soil
huangyuxiang
Agricultural College of Yangtze University
Abstract:  Agricultural mechanization and farming methods are important factors that cause the change of soil physical properties of cultivated land. It is of great significance to explore the variation characteristics of soil physical properties in the fluvial paddy soil area of the Jianghan Plain under different mechanized tillage years, so as to clarify the change trend of regional soil quality, reasonably improve the soil structure of the regional tillage layer, select suitable tillage measures, and further increase crop yield and efficiency. In this study, the interannual variation characteristics and trends of soil physical properties of double cropping rice planting patterns under different tillage years were simulated and analyzed by in-situ simulated tillage experiments in the fluvial paddy soil of the Jianghan Plain. The results showed that: 1) The soil moisture index decreased with the extension of mechanical tillage years, and the soil layer below the plough bottom layer (20~40 cm) was generally stable, and the 30~40 cm layer had a slow increasing trend. 2) Under the action of long-term mechanical tillage, the soil structure stability gradually decreased with the extension of tillage years, and the fragmentation rate of soil aggregate structure increased with the deepening of the profile, and the stability of soil structure decreased. The soil compactness increased greatly with the deepening of the profile and then tended to decrease slowly, which was related to the thickening and upward movement of the plough bottom caused by long-term mechanical operation. 3) Under long-term mechanical tillage, the soil compression capacity generally increased first and then decreased slowly. The early consolidation pressure showed a decreasing trend in the bottom layer of the plough (010~20cm), while the soil in the lower layer of 20~40cm showed an increasing trend, indicating that soil bulk density and water content were the key factors affecting the maximum compressive capacity of soil. The results of this study can provide parameter support and theoretical basis for the improvement of soil quality in rice planting areas of Jianghan Plain.
Keyword:  Mechanical farming  soil compaction  soil physical quality  years of cultivation  fluvo-aquic paddy soil
您是第 6828107 位访问者  冀ICP备05003362号-2
版权所有 ©《中国生态农业学报(中英文)》编辑部
地址:河北省石家庄市裕华区槐中路286号 050022 电话:0311-85818007 E-mail:editor@sjziam.ac.cn
技术支持:北京勤云科技发展有限公司