宁夏中部干旱区氮磷钾肥对油葵干物质积累及养分吸收的影响  

Effects of N、P、K fertilizer rates on the dry biomass and nutrient absorption of sunflower in the dry area of Central Ningxia

作　　者：王晓军[1] 何文寿[2] 

机构地区：[1]宁夏农林科学院固原分院,宁夏固原756000 [2]宁夏大学农学院,宁夏银川750021

出　　处：《农业科学研究》2015年第4期41-46,共6页Journal of Agricultural Sciences

基　　金："十二五"国家科技支撑计划课题(2011BAD29B07-05);国家自然基金项目(31160416)

摘　　要：采用"3414"部分实施试验方法,对宁夏中部干旱区油葵干物质积累及氮磷钾肥吸收规律进行研究.结果表明:油用向日葵干物质积累呈"S"型增长,在现蕾期至开花期最大.全生育期植株不同器官对氮磷钾的吸收量差异较大,总吸收氮量大小依次为叶、籽、茎、盘;总吸收磷量大小依次为籽、叶、茎、盘;总吸收钾量大小依次为茎、叶、盘、籽,油葵全株钾素在叶、茎,盘、籽粒中的含量分别为3.2、4.1、1.6和0.29 g/株.By investigation and analysis, field experiment of Ningxia in the central arid zone with sunflower oil in the absorption of nitrogen, phosphorus and potassium nutrients at different stages, the operation rules are studied, the results show that using sunflower oil in different fertility period its matter accumulation approximation is ＂S＂ type change, and whether in the fertilization treatment or no fertilizer treatment ,each period matter accumulation were the blossom period to bud stag〉flower bud stage to mature stage 〉 three leaf to bud stage 〉 seedling stage. Plant in the whole growth period of the total absorption of nitrogen was leaf 〉seed 〉 stem 〉 disk; Total absorption of phosphorus were seed 〉 leaf 〉 stem 〉 disk; Total absorption of potassium 〉 stem 〉 leaf 〉 seed, respectively, and from the point of their average, in the CPC with the sunflower, the whole growth period of plant leaf, stem, disk, grain absorption of potassium content were 3.2 , 4.1, 1.6 and 0.29 g/strain.

关 键 词：旱作土壤 油用向日葵 干物质积累 养分吸收 

分 类 号：S565[农业科学—作物学]