玉米茎结构参量与产量关联及最优化分析

The relationship and optimization analysis between stem structure parameter and yield

高效高产农业是可持续生产的重点,为研究玉米茎结构参量综合利用效率及最优利用率产量提高幅度,本研究使用2015年北京市小汤山镇获取的玉米数据,将玉米茎结构参量作为输入指标,生物量、产量和经济系数为产出指标,运用数据包络分析探讨利用效率及最优利用效率。结果表明:‘京华8号’玉米茎结构参量利用效率都保持在0.7以上,仅67%达到最优利用效率水平;小喇叭口期和抽雄期茎结构参量利用效率中上部茎粗最差,下部茎粗最优但仍有提高潜力;玉米茎结构参量综合利用效率最优效率时资源充分利用产量有不同程度的提高,其中抽雄期提高产量最大为32%。玉米茎结构参量利用效率尚未达到最优,提高其利用效率尤其抽雄期可显著提高产量。

Efficient and productive agriculture is the focus of sustainable production.In order to investigate the efficiency of corn stem structure parameter and optimal utilization of production improvement.This research used data acquired from 2015 in Xiaotangshan,Beijing,putting stem structure parameter as input indicators,and biomass,yield,and economic coefficient as output indicators.Data envelopment analysis was used to explore stem structure parameter using efficiency and optimal utilization efficiency.The results show that the utilization efficiencies corn stem structure parameters were all maintained above 0.7,which belong to high utili-zation level.During the small bell and tasselling stage of the corn,the upper stem stalk has the lowest utilization efficiency,while the lower stem stalk has the maximum utilization efficiency.The best utilization efficiency of corn stem structure parameter took full advantage of resources,and the yield was improved in different degrees,especially during tasselling,which improved 32%.The corn stem structure parameter utilization has not achieved the optimal efficiency,and improving its utilization efficiency can improve yield significantly.