不同盐分条件下油菜氮、磷、钾素积累与分配差异  

Differences of Accumulation and Distribution of Nitrogen, Phosphorus and Potassium in Rapeseed Under Two Soil Salt Concentration Levels

作　　者：刘婧怡 左青松 王龙 尤晶晶 郑经东 陈家萱 杨光 冷锁虎 Liu Jingyi;Zuo Qingsong;Wang Long;You Jingjing;Zheng Jingdong;Chen Jiaxuan;Yang Guang;Leng Suohu(Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops,Yangzhou University,Yangzhou Jiangsu 225009)

机构地区：[1]扬州大学江苏省作物栽培生理重点实验室/江苏省粮食作物现代产业技术协同创新中心,江苏扬州225009

出　　处：《中国农学通报》2021年第12期24-30,共7页Chinese Agricultural Science Bulletin

基　　金：国家重点研发项目“大田经济作物优质丰产的生理基础与调控”(2018YFD1000900)。

摘　　要：为研究不同盐分浓度对油菜氮、磷、钾积累与分配的影响,以三个甘蓝型油菜品种为试验材料,在低、高两种盐分条件下种植,于成熟期取样测定干物质积累量及氮磷钾元素含量。结果表明:高盐与低盐处理相比,全株及不同器官干重均显著下降。不同处理氮和磷积累量的变化范围分别为141.39~193.14 kg/hm2和21.95~36.24 kg/hm2。3个品种根系中氮、磷积累量平均下降幅度最大,籽粒中钾素积累量平均下降幅度最大。成熟期氮和磷主要分配在籽粒中,不同处理的分配比例变化范围分别为63.15%~67.73%和75.23%~81.56%,钾素主要分配在茎中,其变化范围为45.59%~49.67%。研究不同盐分土壤上油菜成熟期的农艺性状和生理指标,有助于初步明确盐分对油菜产量及元素吸收规律的影响机制。To study the effects of different salt concentrations on the accumulation and distribution of nitrogen(N), phosphorus(P) and potassium(K), three rapeseed varieties(Brassica napus L.) were cultivated under low salt concentration and high salt concentration, respectively. Dry matter was weighed and N, P and K contents were tested at maturity. Results show that with the increase of soil salt concentration, the dry matter accumulation of whole plant and different organs decrease significantly. The range of total N and P accumulation is 141.39-193.14 kg/hm2 and 21.95-36.24 kg/hm2, respectively. Among different organs, the average decreasing range of N and P accumulation in root are the largest, and the average decreasing range of K accumulation in grains is the largest. At maturity, nitrogen and phosphorus are mainly distributed in seeds, and the range of distribution proportion of N and P vary from 63.15% to 67.73% and 75.23% to 81.56%respectively. Potassium is mainly distributed in stems, and its variation is from 45.59% to 49.67%. Studying the agronomic characters and physiological indexes of rapeseed in different saline soil at maturity could clarify the influence mechanism of salt on rapeseed growth and nutrients absorption characteristics.

关 键 词：油菜 盐分浓度 氮磷钾 积累与分配 

分 类 号：S311[农业科学—作物栽培与耕作技术]