耕层和土壤质量是玉米大幅度、可持续增产的首要限制因子  

Topsoil Depth and Soil Quality Were the Primary Limiting Factors for Sharply and Sustainable Yield-increasing of Maize

作　　者：史振声[1] 付景昌[2] 朱敏[1] 

机构地区：[1]沈阳农业大学特种玉米研究所,辽宁沈阳110866 [2]辽宁省农业科学院,辽宁沈阳110161

出　　处：《辽宁农业科学》2013年第3期52-54,共3页Liaoning Agricultural Sciences

基　　金：国家科技支撑计划;东北平原南部(辽宁)春玉米水稻持续丰产高效技术集成创新与示范(2011BAD16B12);辽宁春玉米粳稻大面积均衡增产技术集成研究与示范(2012BAD04B00)

摘　　要：针对我国东北地区玉米生产状况和发展趋势,对玉米大幅度增产和可持续增产的限制性因子进行探讨。分析指出:随着生产力水平的提高,耕层过浅问题越加突显;浅耕是生产水平低下时期的耕作方式,要实现玉米大幅度增产和可持续增产必须在耕层改造上下工夫;耕层太浅是阻碍玉米秸秆还田的根源所在;目前在土壤耕作上还存在一些误区。Aiming at the maize production and development situation in Northeast of China,the limiting factors for sharply and sustainable yield-increasing of maize were analysed in the study. The analysis indicated that, with the improvement of productivity level, too shallow topsoil depth became more problematic. Shallow tillage was a cultivation at low productivity level period. The topsoil depth condition must he improved in order to make sure sharply and sustainable yield-increasing of maize. The source of blocking maize straw returning to filed was too shallow topsoil depth. There was still misunderstanding concerning soil tillage at present.

关 键 词：耕层 土壤 玉米增产 限制因子 

分 类 号：S156[农业科学—土壤学] S513.04[农业科学—农业基础科学]