ACTA AGRICULTURAE BOREALI-SINICA ›› 2013, Vol. 28 ›› Issue (5): 198-205. doi: 10.7668/hbnxb.2013.05.034

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Seasonal Differences in Net Mineralization Rate of Organic Nitrogen in Vegetable Field of North China Plain

JIA Wei1, WANG Li-ying1,2, CHEN Qing1   

  1. 1 College of Resource and Environmental Sciences, China Agricultural University, Beijing 100193, China;
    2 Institute of Agricultural Resource and Environment, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang 050051, China
  • Received:2013-07-23 Published:2013-10-28

Abstract: The high input of nitrogen released from organic manure could not be ignored for nitrogen recom-mendation in vegetable field,however,the unknown parameters on nitrogen mineralization rate released from soil and organic manure influenced the use of N fertilizer recommendation. In this study,the required data to calculate appar-ent net N mineralization rates released from soil and organic manure were selected from the published papers related to vegetable trials in Northern China,in order to understand the differences in growing seasons and land use type. The results showed that significant differences on the average rates of mineralized nitrogen released from organic ma -nure between open field and soil-bound greenhouse field. The average rates of weekly net mineralized nitrogen (WNMN) from soil in greenhouse field were 2.9 kg/ha and 6.2 kg/ha in winter-spring season(WM) and autumn-winter season(AW),respectively;however,the average rates of WNMN from soil in open field was 3.6 kg/ha and 0. 6 kg/ha in WM season and AW season, respectively. The average rates of WNMN from organic manure in soil-bound greenhouse field were 3.6 kg/ha and 3.2 kg/ha in WM and AW,respectively.The average rates of WNMN from organic manure in open field were 1.8 kg/ha and -0.3 kg/ha in WM and AW,respectively.The proportion of seasonal mineralized nitrogen in manure accounted from -14.9% to 34.9% after applied in vegetable field. The accuracy in the rate of WNMN was influenced by nitrogen leaching,which was also related to soil temperature. The results in linear regression analysis showed that no significant correlation was investigated between the amount of mineralized nitrogen and total nitrogen input from manure,and nitrogen surplus in greenhouse and open fields under different seasons. These parameters to describe the rates of WNMN released from soil and manure in vegetable fields are significantly efficient nitrogen management.

Key words: Vegetable field, Greenhouse, Open field, Organic manure, Nitrogen mineralization rate

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JIA Wei, WANG Li-ying, CHEN Qing. Seasonal Differences in Net Mineralization Rate of Organic Nitrogen in Vegetable Field of North China Plain[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(5): 198-205. doi: 10.7668/hbnxb.2013.05.034.

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