| In order to verify the best amount and ratio of fertilizations via the "3414" field trails, and to improve the model of soil testing and formulated fertilization, according to the requirement of soil testing and fertilizer effect of calibration field trail program, the rice field calibration test of fertilizer effect has been proceeded. The test showed that the recommended amount and ratio of fertilization, namely nitrogen fertilizer (46% N) in 10.2 kg/667m2, phosphate fertilizer (12% P2O5) in 4.2 kg/667m2, potash fertilizer (60% K2O) in 5.2 kg/667m2, can get a best grain yield of 407.1 kg/667m2, a net income of 720 yuan/667m2 and a net added value (in addition to field fertility) of 2.3 yuan/667m2, respectively increasing 2.3 percent points, 2.3 percent points and 4.5 percent points compared with the treatment group of recommended fertilization amount. These results of the research can provide a certain basis to the compound design, the guide of fertilizer application and the establishment and validation of fertilization index system. |
