Protective fats are rumen insoluble substances, coated on the surface of oils and fats to prevent rumen fermentation, so as to achieve the purpose of protecting the fat, but not destroyed by the rumen, the fat can be fully digested and absorbed after entering the small intestine. use. Protective fats are used in dairy cows to increase milk production, improve milk quality, reduce stress and improve reproductive performance of dairy cows. The benefits of protective fat feeding cows is a new technology, and specific actions should be taken care of: Choose the type of protective fat product In the practical application of protective fat-fed cows, fatty acids with short carbon chains should be selected from protective fatty products, and fatty acids with short carbon chains with protective carbon chains should be absorbed well into the intestine and have high utilization rate. Also pay attention to the choice of unsaturated fatty acids, better absorption than saturated fatty acids, the effect is good. If the fat used in production is not coated, special attention should be paid when feeding cows: one is to control the added amount; the other is to increase the content of calcium and magnesium in the diet. Control the amount added Adding too much of both causes waste and reduces the intake of cows, which in turn reduces the production performance of the cow. Generally, the total fat content in dairy cows' diets reaches 5% to 6%. Dairy cows have the best utilization rates. When the amount is more than 6%, there will be side effects on the production of dairy cows. On the contrary, when the amount is small, if it is less than 3%, the effect is not obvious. Time to add is timely Post-calving dairy cows consume a lot of energy, and the addition of fat itself is also a stress. Therefore, it is not advisable for dairy cows to be added in the short term after delivery. Should be fed after 3 weeks to 5 weeks postpartum, the impact of stress after the addition of the smaller, the milk production will appear to temporarily drop, but then the milk production will gradually increase. In the hot season, it is better to enter the lactation period and can prolong the peak period of milk production. It will increase milk production throughout the lactation period. However, the effect of lactation to the late stage is not obvious, and there is no need to use this protective fat. Rational composition of rations Feeding dairy cows protective fat should be fed with high-quality hay, so that the amount of fiber can meet the requirements, can promote the rumen more acid production, so as to fully play the role of fat, dairy cows milk production and milk fat content can be significantly increased, in the dry The crude fiber content was 17%, and the acid laundry fiber was 21%. Distinguish applicable objects Cow protective fat is mainly suitable for high- and middle-income dairy cows to adapt to low-yielding dairy cows. The feeding effect is not good. If the average cow's milk yield is lower than 25.5 kilograms, it is not necessary to add grease. If the milk yield exceeds this average value, fat can be added. To increase the energy intensity of the diet to meet its production needs. Practice has proved that dairy cows whose milk fat percentage is less than 3.5% have good use effect. When the milk fat percentage is higher than 3.5%, the effect of adding is not obvious. Step by step Feeding dairy cows protective fat, should gradually increase the amount of feed not to reach the required amount in one step, can avoid the problem of poor palatability, should be divided into three stages to the required quantitative, generally use the full amount after 3 weeks to 4 weeks, this does not Can significantly affect the palatability of dairy cows.
Cucumber
Netherlands cucumber for female is more, mainly for greenhouse cultivation, unlike most outdoor cultivated varieties, they can not through pollination fertilization can finish the development of the fruit, but does not form a fully developed seeds.Early female system has the advantage of fruit maturity, high yield.The characteristics of this type of melon is: melon, one section one melon, section 1, 2 and more than 1 section melon melon.And, if appropriate management level, high yield potential is very big, 667 square meters of single crop yield can be over 10000 kg.1 year can be 2-3 times.
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