江苏农业研究2001，Vol.22Issue(1)：21-26,6.
施氮水平对旱秧本田期氮素营养和根系生长和产量形成的影响
EFFECT OF NITROGEN SUPPLYING LEVEL ON NITROGEN NUTRITION AND THE GROWTH OF ROOTS AND YIELD FORMATION OF DRY NURSERY SEEDLINGS OF RICE IN FIELD
张亚洁 1苏祖芳 1杨连新 1许乃霞 1沙爱红1
作者信息
摘要
Abstract
The effect of nitrogen supplying level on nitrogen nutrition and the growth of roots and yield formation of drynursery seedings of rice in field were studied with the Japonica rice Wuyujing 3 and the mid-season indica hybrid rice Shanyou 63 as materials. Results were as follows: The nitrogen content,amount of nitrogen-uptaking,root weight and root wount flow of Japonica rice Wuyujing 3 Were raised with the increment of nitrogen-applying level. Redundant nitrogen-applying level would result in lower nitrogen content, root wound flow and amount of nitrogen-uptaking at late growth stage of indica hybrid rice. Compared with the moist seedlings, the dry nursery seedlings had higher root activity,nitrogen content and amount of nitrogen-uptaking at early and late growth stage and lower root activity at middle growth stage. Dynamic of tillering behaved higher growth rate of tillering from ture green stage to N－n stage and lower growth rate of tilling after N－n stage. Dry nursery seedlings of rice had higher yield with more ears and larger panicle and lower 103-grain weight under suitable nitrogen-applying level. Raising 103-grain weight was key factor to increase yield of dry seedlings.关键词
水稻/旱秧/氮素营养/根系生长/产量形成分类
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张亚洁,苏祖芳,杨连新,许乃霞,沙爱红..施氮水平对旱秧本田期氮素营养和根系生长和产量形成的影响[J].江苏农业研究,2001,22(1):21-26,6.
