【摘要】 本文通过田间试验和土壤养分的测定,提出以空白区产量(基础产量)所需营养为土壤供给,丰产区产量为计划产量。然后应用有关空白区产量与计划产量的相关回归方程,研完了不同作物、不同产量的施肥量,计划产量与基础产量之差所获得的产量为肥料养分供给。按本研究提出的冬小麦、玉米计划产量的施肥量公式计算施肥量,经验证准确性较高。更多还原

【Abstract】 Through the field experiments and determination of soil nutrients,this paper indicates that nutrients required by the yields(the basal yie-lds)in the blank plot are provided by soil,and that the yields in thehigh yielding plot are considered as the planned yields.And then,thecorrelative regression equation of the yields in the blank and high-yield-ing plots is used to study the different amounts of fertilizers appliedto different crops with different yields.Thus,the yield obtained fromthe difference between the planned yields and basal yields is consideredas nutrients supplied by fertilizer.The amount of fertilizer applied tothe planned yields of winter wheat and corn is calculated with the fer-tilizer application equation suggested in this research whose accuracyis quite high after being tested更多还原