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作 者:李振宙 王炎 吴兴慧 周良 李振东 黄凯丰 LI Zhenzhou;WANG Yan;WU Xinghui;ZHOU Liang;LI Zhendong;HUANG Kaifeng(Technology Research Center of Buckwheat Industry,Guizhou Normal University,Guiyang 550001,China)
机构地区:[1]贵州师范大学荞麦产业技术研究中心,贵阳550001
出 处:《上海农业学报》2020年第5期29-34,共6页Acta Agriculturae Shanghai
基 金:国家自然科学基金(31560358);贵州省科技支撑计划[黔科合支撑(2018)2297、(2019)2297号];贵州省普通高等学校荞麦栽培生理及推广特色重点实验室建设项目[黔教合KY字(2015)328];贵州省教育厅创新群体重大研究项目[黔教合KY字(2017)033、(2018)015]。
摘 要:以‘晋荞2号’为试验材料,研究了磷肥对苦荞根系形态、农艺性状、灌浆特性、充实度和产量的影响。结果表明:‘晋荞2号’的根系长度、根系表面积、根系体积以中磷(MP)处理最高,高磷(HP)处理最低;根系平均直径以低磷(LP)处理最高,MP处理最低。磷肥处理能显著增加‘晋荞2号’的株高、子叶节高度和主茎节数;‘晋荞2号’的1-2节节间长度以LP和MP处理最高,1-2节节间粗度以HP处理最高,0P处理最低;磷肥处理对‘晋荞2号’的主茎分枝数无明显影响;‘晋荞2号’的形态参数(N值)以MP处理最低,HP处理最高;灌浆起始势(R0)以MP处理最高,HP处理最低;达到最大灌浆速率的时间(Tmax.G)以MP处理最短,HP处理最长;‘晋荞2号’的最大灌浆速率(Gmax)、灌浆速率为最大时的生长量与籽粒生长终值量比值(I)、灌浆活跃生长期(D)均以HP处理最大;‘晋荞2号’的充实度和产量以MP处理最大,HP处理最小。可见,中磷处理促进了苦荞的灌浆,提高了充实度及最终的产量。The effects of phosphate fertilizer on root morphology,agronomic characters,filling characteristics,plumpness and yield of tartary buckwheat‘Jinqiao 2’were studied.The results showed that the root length,root surface area and root volume of‘Jinqiao 2’were the highest in MP treatment and the lowest in HP treatment,the average root diameter was the highest in LP treatment and the lowest in MP treatment.The plant height,cotyledon node height and main stem node number of‘Jinqiao 2’were significantly increased by phosphate fertilizer treatment.The length of 1-2 internode of‘Jinqiao 2’was the highest in LP and MP treatments,the thicknesses of 1-2 internodes were the highest in HP treatment,and the lowest in OP treatment.The number of main stem branches of‘Jinqiao 2’was not affected by phosphate fertilizer treatment.The morphological parameters(N value)of‘Jinqiao 2’were the lowest in MP treatment and the highest in HP treatment;the initial filling potential(R0)was the highest in MP treatment and the lowest in HP treatment;the time reaching the maximum grain filling rate(Tmax.G)was the shortest in MP treatment and the longest in HP treatment.The maximum grain filling rate(Gmax),the ratio of growth to final grain growth(Ⅰ)and the active filling stage(D)of‘Jinqiao 2’were the highest in HP treatment.The plumpness and yield of‘Jinqiao 2’were the highest in MP treatment and the lowest in HP treatment.It could be seen that medium phosphorus treatment promoted the grain filling of tartary buckwheat,and improved its plumpness and final yield.
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