| According to the status of chemical fertilizer applying amount as well as the nutrients resource input problems by Chinese farmer, survey and analysis on the winter wheat nutrients resource inputting were carried out in 3 districts or counties in Weibei dryland area, Shaanxi province on 2009. The obtained results showed that 10.0% of the farmers obtained suitable winter wheat yield, 7.5% obtained low yield, 79.2% obtained the lowest yield , 3.3% obtained high yield and, no one obtained the highest yield. The applying amount of pure N for winter wheat in average was 191.5 kg·hm-2, that of P2O5 was 121.2 kg·hm-2, and that of K2O was 74.4 kg·hm-2. 30.0% of farmers applied suitable amount of N, 5.0% applied low amount of N, 4.2% applied the lowest amount of N, 22.5% applied high amount of N, 38.3% applied the highest amount of N. For P2O5, 14.2% of farmers applied suitable amount, 41.7% applied low amount, 15.0% applied the lowest amount, 15.8% applied high amount, 13.3% applied the highest. For K2O, 2.5% of farmers applied suitable amount, 2.5% applied low amount, 78.3% applied the lowest amount, 5.0% applied high amount, 11.7% applied the highest amount. Chemical fertilizer was the main nutrients resource of farmers used for winter wheat, organic manure was the supplementary. Most of fertilizers were used as base manure. |
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