Study on the Application Model of MgSO_2,N,P_2O_5 and K_2O in Potato
Aihua Liu · Anhui nongye kexue · 2006
MgSO2 fertilization in potato was less reported.The design of combination quadrdtic recursive with obverse cross circumrotate was adopted in the experiment in the optimum mathematics model of the ratio of output to cost and the application of MgSO2,N,P and K in potato production.Based on the analysis of the model,the authors carried out the simulated test with computer system and worked out two models of high yield and high efficiency: The model of the ratio of output to cost being over 2.21 and the pure proceeds being over 9 000 yuan/hm2 was that dosage range: the pure MgSO2 is from 15.697 5~18.742 5 kg/hm2,the dosage range of pure N was from 35.1~45.1375 kg/hm2,the dosage range of P2O5 was from 97.47~155.52 kg/hm2 and the dosage range of K2O was from 125.685~149.445 kg/hm2.The model of the ratio of output to cost being over 3 and the pure proceeds being over 10 000 yuan/hm2 was that dosage range pure MgSO2 is from 16.485~27.765 kg/ hm2,the dosange range of pure N was from 9.552 5~44.697 5 kg/hm2,the dosage range of P2O5 was from 63.585~129.915 kg/hm2 and the dosage range of K2O was from 102.802 5~173.947 5 kg/hm2.