Abstract: Mechanisms of degraded Leymus chinensis grasslands and commonly used agronomic,chemical and biological measures were reviewed in this paper.The advantages and disadvantages of each improving method such as plowing,loosing,burning,over-sowing,fertilization and the applications of subtilis,corn stalks or gypsum were further clarified.Physical and chemical soil properties were significantly improved;Leymus chinensis roots were fully developed and occupied a larger ecological niche,and the competitive ability was further strengthened in improving grassland.Recovery speed of aboveground vegetation was apparently accelerated.Aboveground and underground materials had a positive coupling effect.Finally,three comprehensive improving models according to the different degraded levels of Leymus chinensis grassland were proposed in this paper.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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