[Change of farmyard manure application in Shaanxi Province].
The change of farmyard manure (FYM) application in Shaanxi Province since 1986 was analyzed. The proportion of farmyard manure application to total nutrient decreased gradually with years, and was only 46.9% in 2000, which was reduced by 23% compared to the figure in 1986. Soil fertility was gradually reduced, and potassium shortage appeared in farmlands of some regions. The farmyard manure were consumed mainly on grain crops in terms of overall amount of manure inputs, bu application rates of manure to fruit trees and vegetables were higher than that of grain crops in terms of per unit area. Consumption of manure obviously increased in apple since middle of 1990's. The reason of the FYM consumption decrease was also analyzed, and some suggestions were made.
Bao
Xuemei
X
Department of Plant Nutrition, China Agricultural University, Beijing 100094, China. bxiaoxue@263.net
Zhang
Fusuo
F
Ma
Wenqi
W
Xu
Wenhua
W
D002681:China; D018556:Crops, Agricultural; D004463:Ecology; D005308:Fertilizers; D008372:Manure; D012987:Soil / Q000032:analysis
D005308:Fertilizers; D008372:Manure; D012987:Soil