干旱地区农业研究2017，Vol.35Issue(6)：194-200,7.DOI:10.7606/j.issn.1000-7601.2017.06.29
钾肥和密度对胡麻干物质及钾积累转运和产量的影响
Effect of potassium and density on dry matter and potassium accum ulation translocation and seed yield of oilseed flax
摘要
Abstract
In the present study,the cultivar"Longyaza 1"was used as materiala,with three potassium fertilization treatments(K2O):0,45 kg·hm-2and 90 kg·hm-2and three plant density treatments:4.5×106,7.5×106and 10.5 ×106plant·hm-2to investigate the effect of potassium and density on dry matter and potassium accumulation,transloca-tion,seed yield and potassium in seed of oilseed flax(Linum usitatissimum L.).The result showed that dry matter and potassium accumulation increased,translocation amount increased,translocation rate decreased,dry matter and potassi-um translocation from leaf and pericarps and stem to seed contribution decreased,dry matter accumulation of seed yield after anthesis and potassium accumulation in seed after anthesis increased with increasing potassium and density.Under potassium rate(K2O)of 45 kg·hm-2and density of 7.5×106plant·hm-2treatment,the translocation amount of dry matter and potassium from stem,leaf and pericarps of oilseed flax was as high as 1 183.56 kg·hm-2and 30.28 kg· hm-2,respectively,compared with zero potassium and 4.5×106plant·hm-2treatment,and the lowest contribution to seed with 40.28% and 58.72%,respectively.Moreover,the highest seed yield and potassium in seed of oilseed flax were 2 938.33 kg·hm-2and 51.57 kg·hm-2,respectively,increased by 44.32% and 49.43% compared to zero potassium and 4.5×106plant·hm-2treatment.In summary,the optimum fertilization was 45 kg·hm-2(K2O)and 7.5 ×106plant·hm-2for oilseed flax cultivation in the target area.关键词
钾肥/密度/胡麻/干物质/钾积累量/钾转运量/产量Key words
potassium fertilizer/density/oilseed flax/dry matter/potassium accumulation/potassium transloca-tion/seed yield分类
农业科技引用本文复制引用
谢亚萍,牛小霞,牛俊义,杨天庆,吕忠诚,张建平,赵玮,剡斌..钾肥和密度对胡麻干物质及钾积累转运和产量的影响[J].干旱地区农业研究,2017,35(6):194-200,7.基金项目
国家现代农业产业技术体系建设专项(CARS-17-GW-9) （CARS-17-GW-9）
国家自然科学基金(31360315,31560347,31660368) （31360315,31560347,31660368）
