Welcome to Acta Prataculturae Sinica ! Today is Share:

Acta Prataculturae Sinica ›› 2009, Vol. 18 ›› Issue (6): 113-121.

Previous Articles     Next Articles

Effect of nitrogen fertilizer application on Elymus nutans biomass allocationin an alpine meadow zone on the Tibetan Plateau

WU Jian-shuang1,2, SHEN Zhen-xi1, ZHANG Xian-zhou1, FU Gang1,2   

  1. 1.Institute of Geographical Science and Natural Resource Research, CAS, Beijing 100101, China;

    2.Graduate University of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2009-02-09 Online:2009-12-20 Published:2009-12-20

Abstract: Field experiments were conducted in artificial grassland sown in the alpine meadow zone on the Tibetan Plateau, to test the effect of nitrogen fertilizer application on Elymus nutans biomass allocation. The community coverage and the forage yield increased by 42.0% and 808 kg/hm2 in the 175 kg N/hm2 application treatment compared with the control group. The total and component plant biomass increased with the amount of nitrogen fertilizer applied, but the biomass allocation pattern was not significantly affected by nitrogen application. N-fertilization improved the quality of E. nutans. The stem/leaf reached a minimum (2.187) in the 105 kg N/hm2 treatment. Reproductive allocation was mainly controlled by genetic factors and was not significantly affected by nitrogen fertilization. Nitrogen application can improve the assimilation of N and P from soil by artificially sown grassland plants.

CLC Number: