牧场经营方式对草地群落特征和牧草消化率影响.docx

The Effection on Grassland’munity Characteristics and Grass’ Digestibility by the Management of Grazing Land
Abstract
This paper Based on the meadow steppe different running modes of production units (households) as the object of study on grazing ecosystem, has carried on the analysis from three aspects of soil - vegetation and livestock, the main research contents and results are as follows:
munity coverage of CG higher than IG’; The sort order of Chinese
wildrye’s high is CK1 >CG >IG, CK2 >LG >SG.
The IG’s diversity indexes are lowest, which contents Odum and Margale, Monk. There is no significant difference between CG and IG . The order of correlation coefficient is IG >CG > CK1, SG > LG > CK 2 that which between Margalef and Shannon-Wiener .
CK1 of the biomass on the ground is significantly higher than CG, IG, CK2 is significantly higher than LG, SG.
Under the different mode of operation, the total potassium content of grassland soil is the highest. Available p content is lowest. Total phosphorus content is higher than the available phosphorus.
Sanhe cattle's digestion rate are higher than . The digestive rate of IG and LG,
SG had a linear relationship with munity diversity and main species.
The dry matter intake of Sanhe cattle is between - . The plants is 11
kinds which select index greater than were seven to eight activity cycle in everyday.
Key words: Mode of operation; Grazing ecosystems; Meadow steppe; Sanhe cattle; Digestibility
Directed by: Prof. WEI Zhijun
Applicant for Master degree:LU Zhihong (Grassland Ecology and Management)
(College of Ecology and Environmental Science,Inner Mongolia Agricultural University,Huhhot 010018,China)
目 录
1 引言................................................................ 1
放牧对草地植被的影响............................................ 1
植被特征...................................................... 1
群落多样性.................................................... 2
放牧对草地土壤的