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THE STUDY OF THE REALATIONSHIP BETWEEN LEYMUS CHINENSIS POPULATION GROWTH AND ENVIRONMENT ON THE GRASSLAND IN THE NORTHEAST CHINA

Zhang Chong-bang;Zhang Zhong-heng;Yang jing-chun(The biology departmemt of Keshan normal college, Heilongjiang province, 161601 Keshan).  
This Paper studied the growth law of Leymus chinensis and effect of environment factors on the Leymus Chinensis grassland in the northeast China with the grertheory. The results indicated: the growth of opus Chinensis population has adistinCt seasonal variation, it grows best from July to August, the growth rate isfrom 0. 2-0. 403g/m2. d. Among nine environment factors, Hydrolyted nitrogen,quick acting postassium, active organic matter, temperature, PH and effectivePhosphorus to beaus Chinensis growth kaye the best connected coefficients, thoseof hydrolyted nitrogen, quick acting posstassium and active organic matter arepromoted factors,PH is restrictive factors. The best model of Leymus Chinensisgrowth is y=4. 74XI + 6. 15X2 + 2. 48X3 ̄ 73. 64.
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