中国农业大学学报2024，Vol.29Issue(7)：139-147,9.DOI:10.11841/j.issn.1007-4333.2024.07.13
错株种植对密植夏玉米碳氮分配的影响
Effects of staggered planting on carbon and nitrogen allocation of summer maize with close planting
摘要
Abstract
In order to explore the effects of planting density and staggered planting on carbon and nitrogen allocation in summer maize,'Zhengdan 958'was taken as the material.Three planting densities(D1 as 6.75×104 plants/hm2,D2 as 8.25×104 plants/hm2 and D3 as 9.00×104 plants/hm2)and two panting patterns(CK as the parallel planting pattern and S as the staggered planting pattern)were set.The nitrogen and non-structural carbohydrate(NSC)accumulation in plant organs at both silking stage and maturity stage,translocation amount of pre-silking,translocation rate of pre-silking,contribution rate of translocation amount of pre-silking,and accumulation of post-silking for nitrogen and NSC were determined.The results showed that:1)Increasing planting density significantly increased the accumulation,pre-silking translocation and post-silking accumulation of nitrogen and NSC(P＜0.05).Nevertheless,it significantly reduced nitrogen and NSC translocation efficiency and their contribution to grains(P＜0.05).The high planting density of D3was disadvantage to the accumulation and transport of carbon and nitrogen in grains(P＜0.05).2)The S planting pattern significantly increased the nitrogen and NSC accumulation of plants,promoted the nitrogen and NSC pre-silking translocation and post-silking accumulation,improved NSC translocation efficiency(P＜0.05).3)Among all combination treatments,the nitrogen and NSC accumulation,nitrogen and NSC pre-silking translocation and post-silking accumulation in combination D2S were all higher than those in other combinations,and there was no significant decline in translocation rate of pre-silking and contribution rate of pre-silking translocation amount compared with D1CK,which meant D2S was the optimal planting pattern in this study(P＜0.05).Therefore,under the planting level of 8.25×104 plants/hm2 for summer maize planting in Huang-huai-hai area,adoption of staggered planting method can significantly increase the carbon and nitrogen accumulation,promote their transportation to grains,and obtain higher nitrogen harvest index,NSC harvest index and yield.关键词
夏玉米/错株种植/密植/氮素/非结构性碳水化合物Key words
summer maize/staggered planting/close planting/nitrogen/non-structural carbohydrate分类
农业科技引用本文复制引用
张美微,穆蔚林,郭涵潇,李川,张盼盼,何佳雯,牛军,乔江方..错株种植对密植夏玉米碳氮分配的影响[J].中国农业大学学报,2024,29(7):139-147,9.基金项目
国家重点研发计划(2022YFD2300805,2022YFD2300803) （2022YFD2300805,2022YFD2300803）
河南省科技攻关(242102110165) （242102110165）
河南省农业科学院自主创新项目(2024ZC009) （2024ZC009）
