草业学报2019，Vol.28Issue(2)：61-72,12.DOI:10.11686/cyxb2018493
不同颜色地膜覆盖下春玉米主要生长性状对耕层积温的响应
Effects of surface-layer accumulated temperature on major growth traits of spring maize when un-mulched or under clear or black plastic film mulches
摘要
Abstract
The objective of this research was to study the effects of surface-layer accumulated temperature on major growth traits of spring maize under different colored plastic film mulching in the rain-fed region of Northeast China.Field experiments with three film mulching treatments:no mulch (M0), colorless transparent plastic film mulch (M1) and black plastic film mulch (M2), were conducted.Slogistic equation was used to fit the progression of maize plant height, leaf area index, and dry matter accumulation as a function of surface-layer accumulated temperature.It was found that the average rate of maize plant height increase ranked M2＞M1＞M0during early growth, M2＞M0＞M1during stem elongation, and M0＞M2＞M1during grain development.The treatment rankings for accumulation rate of maize leaf area index followed those of plant height during early growth and grain development stages, but ranked M2＞M1＞M0during stem elongation.The black film (M2) treatment significantly increased the duration of dry matter accumulation during the stem elongation stage and reached the stem elongation growth phase earlier than other treatments, and so contributed to improved maize yield.There was a significant relationship between maximum dry matter accumulation rate, the accumulated temperature at which the inflexions of the dry matter accumulation curves occurred, other parameters of the Slogistic equation, and maize yield.The results show that film mulching had the greatest impact on maize development during the early growth stage.Transparent plastic film accelerated leaf senescence, while the black plastic film treatment had the largest dry matter accumulation rate and the highest yield.Results from this research into the effect of mulching treatment options on the growth dynamics of maize and on maize yield can be used to improve resource use efficiency and output of maize production systems.关键词
耕层积温/Slogistic/地膜覆盖/雨养农业/春玉米Key words
surface-layer accumulated temperature/Slogistic/plastic film mulching/rain-fed agriculture/spring maize引用本文复制引用
孙仕军,姜浩,陈志君,朱振闯,张旭东,迟道才..不同颜色地膜覆盖下春玉米主要生长性状对耕层积温的响应[J].草业学报,2019,28(2):61-72,12.基金项目
国家重点研发计划重点专项(SQ2018YFD030062) （SQ2018YFD030062）
辽宁省自然科学基金项目(20180550617) （20180550617）
国家留学基金资助项目(201308210026)资助 （201308210026）
