Analysis on current fertilization and nutrient requirement for forage grasses in China
Understanding current status of fertilizer recommendation in forage grasses and the nutrient demand and removal of forage grasses in various regions and provinces is of great significance for guiding rational fertilization of forage grasses and maintaining sustainable development of grasslands.Based on existed literature,this paper sys-tematically analyzed and summarized the recommended rates of nitrogen,phosphorus and potassium fertilization and the amount of nitrogen,phosphorus and potassium removal per unit yield of harvested hay for perennial forgae grasses,alfalfa,and annual forage grasses.This paper also estimated,analyzed and evaluated the annual nutrient de-mand,annual removal,and their differences of forage grasses at the regional and the provincial level,and proposed suggestion for forage fertilization to maintain grassland nutrient balance and sustainable grass production.In addition,the shortcomings of this study and the representative fertilizer recommendation rates for various grasses were dis-cussed.It is recommended to strengthen research on fertilization techniques for forages and establish characteristic pa-rameters and databases for fertilizer requirements,in order to provide more basic information for scientific fertilization in forage grasses.
NETL
NSTL
万方数据
