Effects of N Application Rate on Cabbage Nitrogen Utilization andContent of Nitrate-Nitrogen in Soil(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:

2012年23期

Page:

181-184

Research Field:

Publishing date:

Info

Title:

Effects of N Application Rate on Cabbage Nitrogen Utilization andContent of Nitrate-Nitrogen in Soil

Author(s):

CAI Wan-tao¹; HUAI He-ju²

1.Beijing Agricultural and Forestry Science Research Institute，Beijing 100097；

2.Beijing Research Center for Information Technology in Agriculture，Beijing 100097

Keywords:

cabbage; N application rate; N uptake and utilization; yield; NO₃^-N

PACS:

S 634.1

DOI:

-

Abstract:

Taking ‘Beijing New No.3’ Chinese cabbage as material，the effect of different nitrogen levels on cabbage nitrogen utilization and residual soil nitrate were studied in this paper.The results showed that there existed the quadratic relationship between nitrogen application rate and yield；the optimal nitrogen rate for the season cabbage was the nitrogen levels of 150 kg/hm²;when nitrogen levels below this value，the soil nitrate residued maintained at a low level，the apparent loss was low；when nitrogen levels exceed the value，the residual nitrate in the soil and the loss in volume would increase significantly；the average nitrogen application rate of growing region was 300 kg/hm²，by improving fertilization and irrigation methods，reducing the nitrogen application rate，it still could obtain a higher yield.

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