土壤与作物2024，Vol.13Issue(4)：512-522,11.DOI:10.11689/sc.2024010801
钾高效型菜用大豆氮磷利用分配对低钾的响应
Responses of nitrogen/phosphorus utilization and partitioning in potassium high-efficiency vegetable soybeans to low potassium condition
摘要
Abstract
Vegetable soybean varieties with high potassium(K)efficiency exhibit increased efficiency in K and dry matter utilization and partitioning.However,the partitioning and utilization of nitrogen(N)and phosphorus(P)in plants during this process are little known.This study aims to investigate potential differences in the accumulation and partitoning of N and P in vegetable soybeans under low K conditions based on different K efficiency types.Using various K efficiency varieties of vegetable soybeans and setting two treatments of low K[0 kg(K2SO4)·hm-2,K0]and normal K application[120 kg(K2SO4)·hm-2,K120],the study compared changes in N,P,and K concentrations and accumulation in both vegetative organ and seed of the plants,as well as their distribution patterns.Results indicated that low K levels reduce the accumulation of N,P,and K in the vegetative and reproductive organs of vegetable soybeans but increase the concentration of N and P in the vegetative organs.Furthermore,the low K condition reduces the K/N and K/P ratio of the vegetative organs,particularly in K high-efficiency varieties,but exhibits little difference in the seeds.Additionally,compared to K low-efficiency vegetable soybean varieties,the N/P in K high-efficiency vegetable soybeans is lower.The increased P relative content might be linked to improved root K uptake and nitrogen fixation.Notably,under the low K condition,the harvest index of N,P,and K is higher in K high-efficiency vegetable soybeans compared to K low-efficiency varieties.From a source-sink perspective,K high-efficiency vegetable soybeans prioritize ensuring nutrient supply to seeds through balanced nutrient utilization.This study offers a foundational reference for breeding nitrogen,phosphorus,and potassium synergistic high-efficiency vegetable soybean varieties.关键词
菜用大豆/钾高效/氮磷钾/营养器官/籽粒Key words
vegetable soybean/high potassium-efficiency/nitrogen,phosphorus and potassium/vegetative organs/seed分类
农业科技引用本文复制引用
王垚,吕艳超,王聪,肖长文,李彦生,刘长锴,张秋英..钾高效型菜用大豆氮磷利用分配对低钾的响应[J].土壤与作物,2024,13(4):512-522,11.基金项目
国家重点研发计划(2021YFD1201103-03) （2021YFD1201103-03）
国家自然科学基金青年基金(42207399) （42207399）
中国科学院大学生创新实践训练计划(20234000297). （20234000297）
