The difference between feed and feed additive is mainly reflected in the composition, especially the performance difference of feed product is more obvious. Assuming that the feed product has sufficient nutrition and reasonable distribution, the benefits of improving pigs can be greatly increased. What is the important nutritional composition of pig feed?

　　1. 氨基酸:

　　1. Amino acid:

　　氨基酸是蛋白质的基本组成部分，可分为必需组和非必需组。必需氨基酸是那些在猪体内不能形成或以缓慢的速度形成，不能满足猪的需要，必须用饲料喂养的氨基酸。猪必需的氨基酸有10种，即赖氨酸、蛋氨酸、色氨酸、精氨酸、苏氨酸、缬氨酸、组氨酸、亮氨酸、异亮氨酸和苯丙氨酸。目前我国饲料原料日粮中赖氨酸、蛋氨酸+胱氨酸、苏氨酸和色氨酸相对缺乏，降低了饲料利用率和动物消费功能。

　　Amino acids are the basic components of protein, which can be divided into essential group and nonessential group. Essential amino acids are those that cannot be formed in pigs or at a slow rate and cannot meet the needs of pigs. They must be fed with feed. There are 10 essential amino acids for pigs, namely lysine, methionine, tryptophan, arginine, threonine, valine, histidine, leucine, isoleucine and phenylalanine. At present, the relative lack of lysine, methionine + cystine, threonine and tryptophan in China's feed feedstuff diet reduces feed utilization and animal consumption.

　　吗?

　　Is it?

　　2. 维生素:

　　2. Vitamins:

　　维生素是促进蛋白质、碳水化合物和脂肪代谢以及保持猪的健康、生长和正常繁殖所必需的有机化合物。它分为脂溶性维生素和水溶性维生素，脂溶性维生素含有A、D、E和K，水溶性维生素含有B族维生素和维生素c。饮食中缺乏维生素可能导致生长异常、生长缓慢、抗病能力减弱和生殖功能下降。

　　Vitamin is an organic compound necessary for promoting the metabolism of protein, carbohydrate and fat as well as maintaining the health, growth and normal reproduction of pigs. It is divided into fat soluble vitamins and water-soluble vitamins. Fat soluble vitamins contain a, D, e and K, while water-soluble vitamins contain B group vitamins and vitamin C. Lack of vitamins in diet may lead to abnormal growth, slow growth, weakened disease resistance and decreased reproductive function.

　　3.矿物性质的分类及其影响:

　　3. Classification and influence of mineral properties:

　　矿物矿物分为主要矿物元素和次要矿物元素。主要矿物元素包括钙、磷、钠、钾、镁、氯和硫。微量矿物元素包括铜、铁、锌、锰等。矿物质元素是动物骨骼和血液以及正常生长和繁殖所必需的。

　　Mineral minerals are divided into main mineral elements and minor mineral elements. The main mineral elements include calcium, phosphorus, sodium, potassium, magnesium, chlorine and sulfur. Trace mineral elements include copper, iron, zinc, manganese, etc. Mineral elements are necessary for animal bones and blood as well as for normal growth and reproduction.

　　4. 膳食能量蛋白(赖氨酸)比例的重要性:

　　4. The importance of dietary energy protein (lysine) ratio:

　　猪通常用饲料来满足它们的能量需求。当食物的能量含量增加时，食物的摄入量就会减少，其他营养素的摄入量也会减少。因此，当能量增加导致采食量减少时，必须维持能量-蛋白质(赖氨酸)比率，并增加饮食中其他营养素的浓度。

　　Pigs often use feed to meet their energy needs. When the energy content of food increases, the intake of food will decrease, and the intake of other nutrients will also decrease. Therefore, when the increase of energy leads to the decrease of food intake, it is necessary to maintain the ratio of energy to protein (LAI) and increase the concentration of other nutrients in the diet.

　　5. 饮食中钙磷比例的意义是什么?

　　5. What is the significance of calcium phosphorus ratio in diet?

　　饮食中钙和磷的适当比例对它们的吸收和利用很重要。钙磷比例不适当会降低其吸收速率，减缓生长速率和骨钙化。

　　The proper proportion of calcium and phosphorus in diet is very important for their absorption and utilization. The inappropriate ratio of calcium and phosphorus will reduce the absorption rate, slow down the growth rate and bone calcification.