低产田水稻测土配方肥效试验初报

Effects of Formula Application on Rice Yield Planted in Field with Lower Yield by Measuring Soil Nutrients

实施农业部测土配方补贴资金项目,达到合理施肥,节本增效的目的,特进行了低产田水稻测土配方肥效试验。试验结果分析得出:低产稻田施肥量与产量的数学模型为y=298.538+12.074N+6.083P+13.061K-0.53N2-0.759P2-0.703K2+0.438NP+0.106NK+0.154PK,667m2氮磷钾最佳施肥指标为:N 12.11 kg、P2O56.65 kg、K2O 8.99 kg,最佳产量为490.65 kg/667m2。

The formula application by measuring soil method was tested in rice field with lower yield to gain the aim of rational application and raise economic benefit in Weng＇an county, Guizhou. The results showed that the mathematics model between application amount and yield y=298. 538＋12. 074N＋6. 083P＋13. 061K-0.53N^2-0. 759P^2-0. 703K^2＋0. 438NP＋0. 106NK＋0. 154PK, the optimum application amount of N, P2O5 and K2O was 12.11 kg/667m^2 , 6.65 kg/667m^2 and 8.99 kg/667m^2 respectively and the optimum yield was 490.65 kg/667m^2.