气井产量变化的影响因素很多，使产量递减预测变得十分困难。
Prediction of declining production of gas Wells is much difficult due to many influencing factors.
这意味着气候条件或其他影响产量变化的因素可能导致大的价格波动。
This means that changes in weather conditions or other factors affecting output can lead to really large price fluctuations.
分析了气候变化、地下水超采、地表径流及粮食产量变化等方面对水资源的影响。
The impacts of climate change, groundwater overdraft, surface runoff and food production changes on water resources are analyzed.
通过2002～2003年对青贮专用型玉米不同种植密度下，单株和群体叶面积、干物质积累及单位面积生物产量变化的研究，探讨单株和群体之间的相互影响。
Study on the effect of different densities of silage corn to the leaf area, dry matter and fresh yield of both single plant and population in 2002~2003.
土壤水分对作物生长发育和产量的影响，在生育过程中具体表现在生长状况和生长量变化上。
Effect of soil moisture on crop growth and yield were performed on the variation of crop growth conditions and biomass growth.
为此，在对产量变化特征和影响产量的敏感性因素进行的基础上，预测了注气结束后凝析油的含量。
Therefore, the content of gas condensate after gas injection was predicted based on analysis of production performance characters and relevant sensitive factors.
在此基础上，分析渗透率模量变化对气藏压力和产量的影响，分析应力敏感性高压气藏井流入动态。
Then, the influence of the permeability modulus on the pressure and production of gas reservoirs and the inflow performance of stress-sensitive gas Wells with high pressure are analyzed.
1987年大面积种植单季晚稻以来，影响粮食单位面积产量变化的气象条件与1987年之前有着明显的差异。
Since 1987, late rice is planted in extensive area. The meteorological factors influencing the variation of grain yield per unit area from 1987 on differ obviously with those before 1987.
1987年大面积种植单季晚稻以来，影响粮食单位面积产量变化的气象条件与1987年之前有着明显的差异。
Since 1987, late rice is planted in extensive area. The meteorological factors influencing the variation of grain yield per unit area from 1987 on differ obviously with those before 1987.
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