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Ecological Intensification to Increase Nutrient Use Efficiency while Maintaining Yield Levels: An Example from China

机译:生态集约化以提高养分利用效率同时保持产量水平:中国的一个例子

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China is facing the challenges of maintaining both foodsecurity and sustainable agricultural development underthe great pressure of its growing population. As one ofthe most important cereal crops in China, maize plays a signifi -cant role in expanding the overall grain production capacity.The attainable yield for maize in northeast China couldbe as large as 16.8 t/ha through high input of nutrients, water,labor, and other cropping system improvements such as cropstraw recycling, no-tillage, and application of organic manure(Fan et al., 2011). The cost of this high yield is the high inputof fertilizer, pesticides, and higher environmental risks includingthe degradation of land and freshwater, greenhouse gasemissions, and the loss of biodiversity. Attaining high grainproduction while minimizing its environmental cost is an importantgoal for China. High fertilizer consumption and lownutrient use effi ciency have raised concerns by both scientistsand the fertilizer industry.
机译:在人口不断增长的巨大压力下,中国面临着维持粮食安全和可持续农业发展的挑战。玉米作为中国最重要的谷物作物之一,在扩大粮食总生产能力方面发挥着重要作用。通过增加养分,水,劳动力的投入,中国东北玉米的单产可达16.8吨/公顷。 ,以及其他农作物系统的改进,例如农作物秸秆的循环利用,免耕和有机肥的施用(Fan等人,2011)。这种高产的代价是肥料,农药的大量投入以及更高的环境风险,包括土地和淡水的退化,温室气体的排放以及生物多样性的丧失。对中国而言,实现高产量同时将环境成本降至最低是重要的目标。高肥料消耗和低养分利用效率引起了科学家和化肥工业的关注。

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