作物研究2024，Vol.38Issue(3)：157-162,172,7.
种植密度对玉米新品种儒研818干物质生产及产量的影响
Effect of Different Planting Densities on Yield and Dry Matter Production Characters of New Corn Variety Ruyan 818
摘要
Abstract
The effects of different planting densities(60 000,67 500,75 000,82 500,90 000,97500 plants/hm2)on agro-nomic characters,dry matter accumulation and distribution,grain-filling process were studied in order to study the effects of high planting densities on the new summer maize variety Ruyan 818 in Shandong South-West area.The results showed that with the increase of planting density,the yield per unit area increased first and then decreased,the plant height and the leaf area index also increased first and then decreased,with the highest value at D5 treatment.The dry matter accumulation per plant showed no difference between the D1 to D5 treatments before silking,while the whole plant dry matter accumula-tion especially the stalk allocation proportion showed a dounward trend.The average contribution for leaf and stalk dry ma-tter remobilization to grain was 18.9%and 81.1%,respectively.With the increase of planting density,the contribution of dry matter remobilization to grain for both the leaf and stalk increased.The grain-filling rate and grain water dehydration rate in the later grain-filling stage decreased and consequently with the lower grain numbers,fewer 100-kernel weight.The suitable planting density range was 75 000 to 82 500 plants per hectare for Ruyan 818.关键词
玉米/种植密度/干物质/产量/儒研818Key words
maize/planting density/dry matter/yield/Ruyan 818分类
农业科技引用本文复制引用
薛法新,郝福庭,付贵林,高秋荣,蒋飞,吴秋平..种植密度对玉米新品种儒研818干物质生产及产量的影响[J].作物研究,2024,38(3):157-162,172,7.基金项目
济宁市现代农业科技创新重点研发计划(2022NYNS019) （2022NYNS019）
国家现代玉米产业技术体系建设专项(nycytx-02). （nycytx-02）
