不同施氮量对甘薯生长发育及产量的影响  

Effects of Different Nitrogen Application Rates on Growth and Yield of Sweet Potato

作　　者：权宝全[1] 吕瑞洲[1] 王贵江[1] QUAN Baoquan;LYU Ruizhou;WANG Guijiang(Industrial Crop Institute,Shanxi Academy Agricultural Sciences,Fenyang 032200,China)

机构地区：[1]山西省农业科学院经济作物研究所,山西汾阳032200

出　　处：《东北农业科学》2019年第6期14-17,共4页Journal of Northeast Agricultural Sciences

基　　金：山西省农业科学院特色农业技术攻关项目(YGG17048)。

摘　　要：在不同氮肥施用量情况下,对甘薯不同生育期的叶面积指数、光合势、干物质积累、产量构成及经济效益进行了研究。2017年和2018年两年试验数据结果表明,施氮210 kg/hm^2处理增加了甘薯各生育期的叶面积指数、光合势和块根干物质积累量,促使果多、果重,产量显著提高;过量施氮(300 kg/hm^2)则产量降低。当施氮量为210 kg/hm^2时,两年甘薯的产量达到最大值,分别为41 034.55 kg/hm^2和42 131.25 kg/hm^2。Under conditions of different nitrogen application rates, the leaf area index, photosynthetic potential, dry matter accumulation, yield components and economic benefits of sweet potato were studied in different growth stages. The results of two years of test in 2017 and 2018 showed that when the nitrogen application rate was 210 kg/ha,the leaf area index, photosynthetic potential, storage root dry matter accumulation were increased in different growth stages, which promoted more and heavier fruits, yield was increased significantly. But when the nitrogen application rate was as high as 300 kg/ha, the storage root yield was reduced. When nitrogen application rate was 210 kg/ha, the two years yields of sweet potato all reached maximum of 41 034.55 kg/ha and 42 131.25 kg/ha, respectively.

关 键 词：施氮量 甘薯 干物质积累 产量 

分 类 号：S531[农业科学—作物学]