土壤与作物2018，Vol.7Issue(1)：55-62,8.DOI:10.11689/j.issn.2095-2961.2018.01.007
行向和种植方式对生育后期玉米叶片衰老进程的影响
Effects of row orientations and planting patterns on senescence of maize leaves at later growth stage
摘要
Abstract
The maize yield mainly comes from photosynthate accumulation after tasseling, while the photosynthetic and physiological characteristics of maize leaf directly affects grain filling;thus, premature aging of functional leaf is one of the important factors affect-ing maize yield.An appropriate change of row orientation and planting pattern could optimize the canopy structure to improve the light condition within the canopy, and effectively extend green period of maize leaf and increase maize yield.We conducted a field experi-ment in Jilin Province with 2×2 treatments: 2 row orientations, east-to-west orientation(EW)and northeast-to-southwest ori-entation(SW20), where the orientation was southwestern 20°;2 planting patterns, '65+65' with 65 cm of both rows(65)and'160+40' with 40 cm of narrow row and 160 cm of wide row.Then, we investigated, during grain filling period, the effect of row o-rientation and planting pattern on SPAD value, nitrogen content, superoxide dismutase(SOD)and peroxydase(POD)activity of leaves at different leaf positions(leaves above ear leaf, ear leaf and leaves below ear leaf).The results showed that SPAD value with lower and ear leaves during the early filling stage and upper leaf during the later filling stage were higher in SW 20 than that in EW.Nitrogen content with different leaf positions was higher in SW 20 than that in EW.As for SW20, nitrogen content with lower and upper leaves in '160+40' row was significantly higher than that in '65+65' row.As for east-to-west orientation, SOD activity with ear and upper leaves in '160+40' row was higher than that in '65+65' row.Compared with traditional planting pattern, treat-ments with 160 cm+40 cm row delayed the aging time of maize leaves and significantly slowed leaf aging speed.关键词
玉米/行向/宽窄行/SODKey words
maize/row orientation/wide-narrow row/SOD分类
农业科技引用本文复制引用
田畅,王洋,卜险峰..行向和种植方式对生育后期玉米叶片衰老进程的影响[J].土壤与作物,2018,7(1):55-62,8.基金项目
吉林省科技发展计划项目(20140101155JC) （20140101155JC）
吉林省与中科院科技合作项目(2015SYHZ0031) （2015SYHZ0031）
研究所"一三五"战略规划项目. （）
