提高食物产量只是部分解答了“气候方程序”。

Improving food production solves only part of the climate equation.

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本文从不同种植密度和施氮量对玉米籽粒产量的影响，建立了二次多项式回归方程。

Second-degree polynomials equation of maize(Zea Mays L. ) grain yield with both planting density and nitrogen fertilization was established by means of regression analysis.

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在产量衰减曲线方程的基础上，通过数学推导，得到了一种对数型产量衰减曲线方程。

Based on production decline curve equation, through mathematical derivation, a kind of logarithmic type production decline curve equation is obtained.

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