用简易Doolittle法求解小麦氮肥效应方程

USING SIMPLE AND EASY DOOL1TTLE SOLVE NITROGEN FERTIZER EFFECTIVE EQUATION OE TIBET

用简易Doolittle法计算了南充地区1983～1984年度小麦良种绵阳15号施氮量多点试验各点的氮肥效应方程。结果表明:不同试点的氮肥效应方程、最佳经济氮肥量、最高产量施肥量及经济施肥量的范围都有较大差异。各效应方程的复相关系数都很大,分别达到5％或1％显著水平,说明各点的氮肥效应方程是可信的,可供小麦施肥参考。

In 1983-1984, a test of amounts of nitrogen applied for the improved wheat variet-mianyang 15 in multisite was conducted and the nitrogen fertilizer effective equations at each site was culcul-ated by the Doolittle method.The results showed that there were significant variation in the effective equationsof nitrogen applied,the optimum economical amounts ofaapplication,the apllied amount for the highest yielded andthe range of economical amount of nitrogen fertilizer applied respectively. The multiple correlation coefficients of each effective equation were high at the 0.05 and 0.01 probabjlity levelseparetely.Which showed that the effective equation of each test site could taken for a reference to nitrogen fertilizer applied in wheat.