农田合理投能区域与最优投能配比的研究

Rational range and optimum proportion of energy input in farmland

研究表明 ,农田人工辅助能投入有一个合理的投能区域 ,在该区域内增加水肥投能可增加总产出能和产投比 .总产出能的合理投能区域大于产投比的合理投能区域 ;低产农田的合理投能区域大于高产农田 ,通过人工辅助能的增加 ,可使低产农田与高产农田一样达到作物的最高产量水平 .在合理投能区域内存在水分投入高效线和肥料投入高效线 ,在两条线上相应的水分和肥料投入效益最高 ;也存在最优投能配比线和最优经济投入配比线 ,在两条线上的水肥投入 ,其能量产投比和经济产投比最高 ,是水肥投入的最优值 .农业资源投入可以通过资源代换达到等同产出 。

There exists a rational range of artificial supplemental energy inputs in fields.In the range,the inputs can improve the yield and the output/input ratio.The rational range of energy input in total energy output is bigger than that in the output/input ratio.It is bigger in low yield fields than high yield fields,which suggests that increasing artificial supplemental energy input can increase the production of low yield fields as same as high yield fields.In the rational range of energy input,there exist high efficient lines in water and fertilizer inputs.The highest efficiency occurs when the rational inputs of water and fertilizer occur in these two lines.There also exist optimum lines of energy and economy input proportions.In the two lines,the proportions of energy and economy output/input of water and fertilizer inputs are the highest,which are the optimum of water and fertilizer inputs.Water and fertilizer may replace each other for equal yields,but would result in a decrease in the output/input ratio.