硅钙肥、生石灰、硫肥三因素二次多项式回归大豆产量效应分析

QUADRATIC POLYNOMIAL REGRESSION ANALYSIS OF SILICON AND CALCIUM FERTILIZER,QUICKLIME AND SULFUR POWDER ON SOYBEAN YIELDS

对硅钙肥、生石灰、硫磺粉三种肥料因素进行了二次多项式大豆产量回归分析。结果表明,硫磺粉的产量灵敏度峰值和单因素产量峰值最高,硅钙肥居中,生石灰最低;互作效应对产量的作用表现为硅钙肥与硫磺粉的互作对产量作用极显著。硫磺粉对产量作用相对较大。在本试验条件下,大豆单产水平≥3000 kg/hm2的施肥方案为,硫磺粉14.0 kg/hm2,硅钙肥和生石灰免施;大豆单产水平≥3 200 kg/hm2,硫磺粉43.0 kg/hm2,硅钙肥和生石灰免施。

Quadratic polynomial regression analysis of silicon and calcium fertilizer, quicklime and sulfur powder on soybean yields was given. The peak of sensitivity and soybean yields of sulfur powder were the highest, silicon and calcium fertilizer with the second best, and quicklime with the lowest. The interaction between silicon and calcium fertilizer and sulfur powder on soybean yields was significant at 0.01 level. Sulfur powder effected soybean yields most effectively. Under conditions of the study, sulphur powder should be at 14. 0kg/hm^2 without quicklime and silicon and calcium fertilizer if soybean productivity≥3 000 kg/hm^2, and sulphur powder should be at 43.0 kg/hm^2 without quicklime and silicon and calcium fertilizer if soybean productivity≥3 200 kg/hm^2.