求翻译：在生产实践中，猪的各个生长时期的采食量明显地受到猪的生理健康状况和采食时的环境状况等多种因素的干扰，因而使到对猪的各个生长时期的采食量进行定性和定量的科学分析有极大的困难，不易对这个采食量相关的猪各个生长时期的日增重效能进行科学的判断。而力求通过提高猪的采食量来提高猪的生长速度，缩短猪的上市日龄来获取更大的经济利益是饲养者的需求，正是这种需求形成了对营养学家和饲料企业关注热点的压力[9]。是什么意思？

Practice in the production, pig feed intake of the various growth stages significantly affected by the interference of the physiological health status of pigs and feed, environmental conditions and other factors, and thus so that the feed intake on pig growth during the qualitative and quantitative

In practice, and the pig production in the period of growth in the eaters pigs are obviously the physiological state of health and food at a variety of factors, such as the state of the environment as a result of the interference of pigs, the period of growth in the food intake for qualitative and q

When the production practice, pig's each periods of growth pick the appetite obviously to receive pig's physiological state of health and picks the food the environment condition and so on many kinds of factor disturbance, thus causes to pick the appetite to pig's each periods of growth to carry on

In production practice in the, pig of all growth period of feed intake volume clear to was pig of physiological health status and feed intake Shi of environment status, multiple factors of interference, and makes to on pig of all growth period of feed intake volume for qualitative and quantitative o

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