[Changes of crop yield and soil fertility under long-term application of fertilizer and recycled nutrients in manure on a black soil III. Soil nutrient budget].
The nutrient budget of fertilization models under different treatments was calculated using data from a field experiment over the period of 1985-1999. The results indicated that application of nitrogen fertilizer accelerated a large deficit of soil phosphorus, and the use of nitrogen and phosphorus accelerated the deficit of potassium. The experimental data demonstrated the appearance of a large area of soil deficit of phosphorus from 1970s and of potassium from 1980s in China. Nutrient recycled in farming system improved soil nutrient budget, but could not meet the nutrient requirements from high-yield crops. The use of recycled nutrients with an appropriate use of fertilizers according to the soil fertility could produce higher crop yields, balance soil nutrient budget, and not cause surplus nutrients to emit into environment.
Liu
Hongxiang
H
Heilongjiang Institute of Agricultural Modernization, Chinese Academy of Sciences, Harbin 150040.
Wang
Delu
D
Wang
Shouyu
S
Meng
Kai
K
Han
Xiaozeng
X
Zhang
Lu
L
Shen
Shanmin
S
D000383:Agriculture; D003247:Conservation of Natural Resources; D018556:Crops, Agricultural / Q000254:growth & development*; D005308:Fertilizers; D008372:Manure; D010758:Phosphorus / Q000172:deficiency / Q000378:metabolism; D012987:Soil / Q000032:analysis*
D005308:Fertilizers; D008372:Manure; D012987:Soil; D010758:Phosphorus