What is the feed value of leaves? What are the edible leaves, be comprehensive

Leaves, although its appearance is rough, but the nutrient content can not be low, especially acacia, purple locust, mulberry, elm, structure and other leaves of the protein content of more than 20, is a good protein and vitamin feed for livestock and poultry**. 1. Nutrient content of leaves (Table I) As can be seen in Table I, the nutrient content of leaves varies greatly among different varieties. The protein content of leaves of elm, acacia, acacia and purple locust was relatively high, followed by willow, poplar, quercus and paulownia. The protein content of fruit tree leaves such as apricots, persimmons, dates, plums, and apples is low.

In addition, the place of origin, collection method, and preparation method also have an impact on the nutrient content of leaves. The leaves of cash crops such as mulberry and tea and the leaves of medicinal plants such as schisandra and wolfberry can be used as fodder.

In particular, the crude protein content of wolfberry leaves is high, which is a good protein supplement. According to the analysis, the carotene content in the leaves of willow, birch, hazel, alder and other green trees was 110 132 mg kg, and the carotene content in the green leaves of Acacia purpurea could reach 270 mg kg. Walnut leaves are rich in vitamin C, and pine and cypress leaves contain a lot of carotene and vitamin C, vitamin E, vitamin D, drill amine, vitamin K, etc.

Secondly, the leaves also contain iron, diamond, manganese and other elements and relatively complete amino acids. Second, the feed value of the tree The feed value of the leaves is shown in the table, and the feed value of different varieties of leaves varies greatly. For example, the protein content of the leaves of purple heavy locust, acacia and elm is high, and its utilization rate is also high, and the digestible protein per kilogram can reach 50 60 grams.

On the contrary, the leaves of fruit trees such as grapes, dates, apples, and persimmons have a low protein content and low digestibility, with only about 20 grams of digestible protein per kilogram. The leaves of trees such as willow, pear, mulberry, poplar and paulownia not only have high organic matter content, but also high heat content. The digestible energy value of pigs can reach more than 8 gigajoules l kg (dry matter).

The metabolic energy value of chickens is about megajoules. However, some leaves contain tannins, have an astringent taste, and have poor palatability. For example, walnut, mountain peach, oak, plum, paulownia, persimmon, poplar and other leaves must be fermented or silage before they can be fed.

Feeding method: Conifer powder is suitable for all kinds of livestock and poultry as added feed, and can be directly fed or added to mixed feed. Conifer meal should be fed periodically, continuously fed for 15-20 days, and then intermittently for 7-10 days, so as not to affect the quality of livestock products.

Feeding amount: pine needle powder contains pine resin odor and volatile substances, and the addition amount in livestock and poultry feed should not be too high. Generally, the addition amount in pig feed is 5%-8%, broilers are 3%, laying hens and breeders are 5%, ducks and geese are 10%, and cattle and sheep are 10%-15%.

Needle leaf leachate. Feeding needle extract can not only promote the growth of livestock and poultry, but also reduce the incidence of bronchitis and pneumonia in sheep, and increase appetite and disease resistance. Therefore, it is also known as needle leaf extract as a health care agent.

Preparation of leachate. Crush the needles, put them in a bucket, and add 70-80 warm water (the ratio of needles to water is 1 10). After stirring, cover tightly, and place it at room temperature for 3-4 hours to obtain an extract with a bitter and astringent taste.

Locust leaves, poplar leaves and mulberry leaves, after drying and crushing, can replace 50% of alfalfa powder to feed rabbits. Fresh birch leaves, elm leaves, wrought leaves and other juicy and delicious, rich in trace elements, rabbits love to eat and easy to digest, and is conducive to female rabbit milk production. Apple leaves are also good rabbit feed, but it should be noted that leaves cannot be collected within l0d after spraying to feed rabbits.

Cypress leaves, pine leaves, etc. can be used to feed rabbits after drying and crushing, and each rabbit is fed 20-30g per day. However, the leaves themselves often contain tannins, and the lignin content is high, which makes the palatability poor and the digestibility decreases; Adding 3-5% pine needle powder to rabbit feed can promote animal health and improve production performance. The way and time of leaf harvesting have a great impact on the nutrient content of leaves.

The collection of leaves should be carried out without affecting the normal growth of trees, and the branches must not be broken and the trees should not be destroyed and the greenery should be destroyed. (1) Harvesting method 1Green mowing method.

It is suitable for shrubs with many branches, fast growth and strong regeneration, such as purple locust, horizontal seed, etc.

There are many edible leaves, and many fruit tree leaves are edible, but the taste and texture are different. We often eat eleutherococcus senticosus, spiny ginseng leaves, thorny sprouts, mulberry leaves, toon leaves, etc., and I have also eaten willow buds, elm leaves, hawthorn leaves, wolfberry leaves, etc. Many tree shoots and leaves are edible, as long as they are non-toxic, but the taste is different, there are sour, bitter, spicy, astringent, sticky, slippery, etc., which can be selected according to their own situation.

Willow leaves, elm leaves, and loquat leaves can be used in medicine.

Farmers in the plains and mountainous areas of China raise rabbits, which can make full use of the local leaf resources. The most planted trees are black locust, willow and aspen. Their nutritional value varies greatly depending on the harvest season (Table 17).

Table 17 Changes in nutrient content (%) of several leaves in different seasons From Table 19, it can be seen that the protein content is the highest in summer, while the fiber content is the lowest. As the harvest period lengthens, fat and fiber increase and protein decreases. Therefore, when feeding rabbits with leaves as the main roughage, the harvest season should be distinguished in order to determine the appropriate proportion to be added.

1.Photosynthesis provides organic matter to individual plants.

2.Photosynthesis absorbs carbon dioxide and emits oxygen.

3.Absorbs noise.

4.Transpiration promotes the transport and absorption of water and inorganic salts by individual plants5Transpiration promotes the water cycle throughout the biosphere.

Most of the leaves can be used as feed for meat rabbits, commonly used: purple locust leaves, locust leaves, acacia leaves, elm leaves, pine needles, fruit leaves, mulberry leaves, tea leaves and medicinal plants such as schisandra and wolfberry leaves. This kind of feed contains more protein and vitamins, especially the young fresh leaves are the best, followed by the green and young leaves.

In the vast mountainous areas, the planting area of acacia is large, and the protein content in the leaves is as high as more than 18%, which is a good protein and roughage resource; Pine needles are rich in resources in some mountainous areas, have high nutritional value, and also have certain pharmacological effects, and have great development potential; Mulberry leaves, high in protein, ***. Especially in recent years, the large-leaved mulberry, also known as the feed mulberry, has large leaves, high yield, not only has the value of feed, but also has the effect of sand prevention and sand fixation, and soil improvement. Fruit trees are planted in large areas throughout China, but because they are mainly fruit-producing, the leaves are generally not collected during the growth period.

Some fruit tree leaves have pesticide residues, and special attention should be paid to the use of pesticides.