摘要
采用田间试验的方法,探讨了不同氮水平影响下马铃薯块茎中蛋白质和淀粉含量的动态变化规律。试验结果表明:播种后63～91 d,不同处理的块茎粗蛋白质含量随施氮水平的增加而增加,之后施氮120kg.hm-2处理下降较快;过量的氮肥不利于可溶性糖向淀粉的转化;马铃薯收获时,各处理马铃薯块茎总淀粉含量分别为61.92～66.91g.100g-1.DW,过高的氮肥水平并不利于马铃薯生长后期块茎中淀粉的积累以及直链淀粉的相对含量的提高。
The effect of nitrogen application rates on dynamic change law of tuber protein and starch synthesis of potato was studied in field experiments.The results showed that protein content of tuber also increased gradually from 63 to 91 days after sowing with the increase of nitrogen amount,but after that in 120 kg.hm-2nitrogen treatment it decreased rapidly.Excessive nitrogen fertilizer was not favor to the transformation of soluble sugar to starch.The starch content of potato tuber was 61.92～66.91 g.100 g-1.DW at harvest.Excessive nitrogen fertilizer was not favor to the starch accumulation in tuber and the amylase relative content increase at later stage of potato growth.
出处
《吉林农业科学》
CSCD
北大核心
2013年第4期38-41,共4页
Journal of Jilin Agricultural Sciences
基金
黑龙江省科技厅重大项目(GA06C101)
黑龙江省农垦总局重点项目(HNK11A-05-10)
关键词
马铃薯
氮肥水平
蛋白质含量
淀粉含量
Potato
Nitrogen application rates
Protein content
Starch content
