Effects of fertilizations on species composition and diversity of grassland in Keerqin Sandy Lands

Abstract

Abstract: Effects of different fertilization on species composition, community structure and species diversity of grassland were studied in Keerqin Sandy Lands. 1) Species composition, dominant species and family structure of the species of grassland communities were changed both by nitrogen fertilizer (N) alone and by nitrogen plus phosphorus fertilizers (N+P). Nitrogen and N+P significantly (P<0.05) increased vegetation height and coverage by 64.5 and 66.8 cm, and by 17.1% and 18.1%, respectively. 2) Phosphorus fertilizer alone (P) did not significantly change species composition or community structure. 3) Species richness, Shannon-Wiener index, Simpson index and Pielou evenness index were also significantly (P<0.05) improved by N and N+P. Nitrogen and N+P markedly reduced species richness by 49.5% and 51.5%. 4) P did not significantly change species number and diversity of sandy grassland. The results suggest that, in addition to productivity, reasonable species composition and community structure are considerations for the process of restoring and managing degenerated grassland ecosystems.

CLC Number:

Q948.15⁺8

LI Lu-jun, YU Zhan-yuan, ZENG De-hui, AI Gui-yan, LI Jing-shi. Effects of fertilizations on species composition and diversity of grassland in Keerqin Sandy Lands[J]. Acta Prataculturae Sinica, 2010, 19(2): 109-115.

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