结果表明，优化施肥能明显降低稻-麦轮作系统中的氨挥发损失，提高稻麦对氮素的利用率。
The results showed that ammonia volatilization losing could be obviously reduced in rice-wheat rotation system with optimization method, and nitrogen efficiency was also improved.
要使冷季型混合草坪产生良好的景观效果，首先要对草种进行优化组合，其次浇水、施肥、修剪、打药等要讲科学。
To attain good landscaping of cold season admixed lawn, firstly the grass seeds must be fit together optimized; watering, pruning and pesticide spraying must be managed scientifically.
以小麦生物学特性和土壤植物营养学为依据，在小麦生育模拟基础上，建立了小麦生育优化动态模式和最佳经济效益施肥模型。
Based on simulation of wheat growth phase, a computer simulation model for wheat growth optimization and fertilizer application with optimum economic performance was set up.
但是在实际操作中灌溉量、施肥量与灌溉和施肥的时机都不容易实现最优化控制。
But in practical operating, the quantity and the timing of fertilization and irrigation can not be controlled exactly and optimally.
但是在实际操作中灌溉量、施肥量与灌溉和施肥的时机都不容易实现最优化控制。
But in practical operating, the quantity and the timing of fertilization and irrigation can not be controlled exactly and optimally.
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