学术
冬枣果实膨大期追施尿素对叶片氮代谢的影响
彭勇[1] 田福忠[1] 张小燕[2] 周鹏[2] 彭福田[2]
[1]菏泽学院园林工程系,菏泽山东274000 [2]山东农业大学园艺科学与工程学院,泰安271018
摘 要:
研究了冬枣果实膨大期追施尿素后叶片氮代谢指标的变化。结果表明，随着施氮量的增加，叶片叶绿素和蛋白质含量均呈上升趋势，以400g高氮追施最高，施氮量的增加对氨基酸的影响较小。叶片是硝酸盐还原的主要部位，NR活性显著高于根系，是根系的10倍左右，尿素施用量与NR活性无显著相关性，以100 g低氮处理NR活性较高，追施尿素可维持叶片较高的NR活性。[著者文摘]
文章出处:
《西北农业学报》-2007年16卷5期 -163-166页
文献标识码:
A
文章编号:
1004-1389（2007）05-0163-04
Effects of Topdressing Urea on Nitrogen Metabolism of Leaf during Fruit Swelling of Winter Jujube
PENG Yong, TIAN FU-zhong , ZHANG Xiao-yan , ZHOU Peng,PENG Fu-tian. （1. College of Garden Engineering of Heze University, Heze Shandong 274000, China;2. College of Horticulture Science and Engineering of Shandong Agricultural University, Tai＇an Shandong 271018,China）
Abstract:
Experiment was conducted to study the changes of leaf nitrogen metabolism after fertilization during the fruit swelling of winter Jujube. The result showed that chlorophyll and protein contents were increased with the increasing of fertilization and reached highest by higher nitrogen treatment of 400g urea,the changes of amino acid was not significantly changed which take little effect with the increasing of fertilization. It was also indicated that leaf was the main organ which assimilated NO3- and NR activity in leaf was ten-time higher than root. The treatment of fertilization have no significant correlation with the activity of NR and the level of 100g low nitrogen showed higher NR activity. Urea can keep higher NR activity compared with CK.[著者文摘]
Key words:
Winter jujube; Fruit swelling period; Urea; Nitrogen metabolism; NR
更多>>免费文章
cqvip.com