Effects of long-term fertilization on wheat yield on Loess Plateau

Abstract

Abstract: 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穐m^-2 under Nfertilization, 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 Pfertilizer 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.

Key words: Dryland wheat, Long-term fertilization, Yields effect

CLC Number:

S158.3

HAO Mingde, LAI Lu, WANG Gailing, DANG Tinghui. Effects of long-term fertilization on wheat yield on Loess Plateau[J]. Chinese Journal of Applied Ecology, 2003, (11): 1893-1896.

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