|Table of Contents|

Effect of Water Saving and Nitrogen Controlling on Nitrogen Temporal and Spatial Distribution in Greenhouse Vegetable Fields of Upstream Area of the Yellow River(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2012年04期
Page:
37-40
Research Field:
Publishing date:

Info

Title:
Effect of Water Saving and Nitrogen Controlling on Nitrogen Temporal and Spatial Distribution in Greenhouse Vegetable Fields of Upstream Area of the Yellow River
Author(s):
QU Ji-song1; ZHANG Li-juan1; FENG Hai-ping1; YANG Dong-yan1; GUO Wen-zhong1; WANG Cai-ling2
1.Institute of Germplasm Resources,Ningxia Academy of Agriculture and Forestry Science,Yinchuan,Ningxia 750002；
2.Bureau of Lingwu Agriculture,Lingwu,Ningxia 751400
Keywords:
the upper stream of the Yellow River; solar greenhouse; water saving and nitrogen controlling; nitrogen migration; temporal and spatial distribution
PACS:
S 158.2
DOI:
-
Abstract:
In order to explore effect of water saving and nitrogen controlling on nitrogen use efficiency and nitrogen transport law,adopting randomized block designs,to obtain dynamic change information on soil nitrogen to evaluate soil nitrogen transport law and nitrate leaching in different growth stages of celery,in 0~160 cm soil profiles in greenhouse in the upper reaches of the Yellow River.The results showed that at the same nitrogen application rate,soil total nitrogen gradually increased (treatment 1＜treatment 2＜treatment 5) in 0~20 cm and soil total nitrogen gradually decreased (treatment 1＞treatment 2＞treatment 5) in 20~40 cm and in 40~60 cm,with the decrease of irrigation quota,total nitrogen mass fraction,and the law was changed greatly in the topsoil (0~60 cm)；NO3-N changed regularly,which was a negative correlation with irrigation quantity,which was a positive correlation with nitrogen application rate during growing periodicity

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Last Update: 2014-08-26