Recommended to 20 17 ~ 05-28

Under the condition of good water and fertilizer, alfalfa can be cut 3-5 times a year, fresh alfalfa is 4000-6000 kg, 0.5-0.6 kg 1 10,000 kg, and the yield is 8000 kg. The first mowing amount is 40-50%, usually 3.73kg of fresh grass (such as cut flowers at the beginning of flowering, with water content of 77.5%) and hay 1kg (water content 16%). The first crop can produce 500 kilograms of hay. The annual output of the four crops is 4500 kg, with an average yield per plant of 1 125 kg /302 kg. A few kilograms of grass can be used to harvest one kilogram of hay. The formula is: (100) hay water content (100- grass water content) = (100-16) (100 ~ 77). 5) = 3.73kg, and the total moisture content of hay is 15% ~ 18%. For example, the average value is 16.5%. Alfalfa needs 82% ~ 4.64 kg green grass and 1 kg hay in vegetative growth period. The water content at the initial flowering stage is 80. 1%, and it takes 4.2 kg of grass to dry 1KY hay. At the beginning of flowering, the water content is about 77.5%. Usually 3.7 1Kg fresh grass is used to make 1Kg hay. 3.3kg is needed when the water content is 74.7% at flowering stage, and 2.85 kg is needed when the water content is 70.7% after harvest. The growth period from seed germination to flowering is called "vegetative growth period", and the growth after flowering is called "reproductive growth period". You can calculate it yourself according to the actual situation. The output can be selected at the middle level of the representative graph. After cutting 1 m2, weigh it and multiply it by 667, which is the yield per mu. The moisture content of hay can be estimated by visual inspection: Method for determining the moisture content of hay: 1. Moisture content 15 ~ 16%: when rubbing grass by hand, the sand makes noise, but the fertile leaves and low grass are not easy to break, the stems are broken, the leaves are dry and curly, and the cuticle on the stems is used together with nails. You can't take off your clothes. This kind of grass is suitable for stacking. The water content is 2. 16 ~ 18%: there is no cracking sound when scraping the straw bales, only sand and sand. Only the grass is broken, some plants will break, and the upper stem can leave traces of bending, but the stem is damaged, the leaves sometimes curl, the upper leaves are soft, and the epidermis is CA. The nails hardly fell off. This kind of grass is suitable for stacking. The water content is 3. 19 ~ 20%: it can't make a crisp sound, but the coarse yellow grass has a clear crackling sound and the hay is soft. Dams are easy to weave, and can be folded and woven repeatedly. When the grass is twisted, it will not come out, but it will feel wet. The epidermis of grass cannot be peeled off, and the upper epidermis of leguminous stems sometimes peels off. Accumulation is dangerous. 4。 Water content of 23 ~ 25%: no rustling when kneading; When bending the crank, there are water drops at the bend, and it feels cool to insert your hand into the haystack. Unable to stack storage. (Li Siqi)

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