[Effects of long-term fertilization on wheat yield on Loess Plateau].
The effect of long-term fertilization on the yield of winter wheat was studied on the basis of 18-year located experiment on the Loess Plateau. The results showed that the winter wheat yield increased 418.1 kg.hm-2 under N fertilization, and the average increasing rate was different with precipitation. In average and rain rich year, the average increasing rate were 30.3% and 58.9%, respectively, but in drought year, the yield decreased, and its average decreasing rate was 13.9%. The winter wheat yield under P fertilizer increased in drought year, and decreased in average and rain rich year. The average increasing rate was 6.5% in drought year, and the average decreasing rate was 15.4% and 10.0%, respectively. The average increasing rate in M, NP, PM, NM and NPM was 82.8%, 127.8%, 18.9%, 144.4%, and 169.3%, respectively. In addition, precipitation affected the amount of spike, grains per spike, and weight of thousand-grains.
Institute of Soil and Water Conservation, Northwestern Sci-Tech. University of Agriculture and Forestry, Yangling 712100, China. haodong@public.xa.sn.cn
Mingde
M
Hao
Lu
L
Lai
Gailing
G
Wang
Tinghui
T
Dang
D018556:Crops, Agricultural / Q000254:growth & development*; D005308:Fertilizers; D009584:Nitrogen / Q000494:pharmacology; D010758:Phosphorus / Q000494:pharmacology; D011891:Rain; D014908:Triticum / Q000254:growth & development*
D005308:Fertilizers; D010758:Phosphorus; D009584:Nitrogen