Welcome to Chinese Journal of Ecology! Today is Share:

cje ›› 2004, Vol. ›› Issue (5): 13-18.

Previous Articles     Next Articles

Effect of long-term irrigation and fertilization on nitrogen,phosphorous,and potassium pools of cinnamon soil in semi-arid area IEffect on nitrogen pool of cinnamon soil farmland

LIU Zuoxin1, ZHENG Zhaopei1,2, FENG Yanping3, LI Guifang1   

  1. 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    2. College of Population, Resource and Environment, Shandong Normal University, Jinan 250014, China;
    3. Institute of Scientific and Technological Information, Anshan 114002, China
  • Received:2004-04-23 Revised:2004-05-25 Online:2004-10-10

Abstract: With quadratic regression general rotation design,a long-term field trial was carried out in the semi-arid area of western Liaoning,to study the effects of irrigation and fertilization on soil nitrogen pool.The results showed that the contents of soil total nitrogen and hydrolyzable nitrogen can be reduced by irrigation.Soil nitrogen content was increased by the application of N fertilizer.Soil nitrogen content declined at first and then increased with the increasing application of phosphorous fertilizer.Soil nitrogen,especially hydrolyzable nitrogen,was remarkably improved with straw mulching application.Therefore,straw mulching is an efficient measure to maintain and improve the regime of soil nitrogen nutrition.

Key words: Heavy metal ions, Itopenaeus vannamei, Hepatopancreas, Gill, Blood, SOD

CLC Number: