Production practice shows that pre-bamboo fertilization is a key measure to supplement the nutrients of bamboo shoots and ensure high yield, stable yield and high quality of spring bamboo shoots. There are four technical points:
Fertilization time is generally in the month before the bamboo shoots, that is, from mid-February to early March. At this time, fertilization can promote the vigorous growth of the sprouted bamboo shoots, and the bamboo shoots are tender and tender.
The fertilizer types mainly apply chemical fertilizers such as quick-acting urea, ammonium hydrogencarbonate and ammonia water, and can also be applied to fully decomposed rapeseed cake and human excrement. If it can be combined with the application of silicon fertilizer, the effect is better. Bamboo leaves, straw, and pigs have more silicon in their fertilizers. Calcium, magnesium and phosphate fertilizers and superphosphate can supplement the phosphorus content of forest land, and can be appropriately applied according to needs.
The amount of fertilization should be determined according to the soil fertility of the forest land and the bamboo shoot production target. For example, 667 square meters of bamboo shoots for bamboo shoots with an annual output of 1,500 kilograms of bamboo shoots, the annual application of nitrogen fertilizer 47 kg, phosphate fertilizer 21 kg, potassium fertilizer 20 kg. The amount of pre-bone fertilizer accounts for 2/5 of the total fertilization in the whole year. When fertilizing, if only one fertilizer is used, urea is 50 to 70 kg per 667 square meters, ammonia water is 75 to 100 kilograms per 667 square meters, rapeseed cake is 667 square meters 50 to 75 kilograms, and ammonium bicarbonate is used for each mother bamboo. Use 40o to 500g.
Fertilization method The bamboo shoots are applied in the bamboo shoots as well, and the ditch can also be used. The former opens a circular or radial groove of 25 to 4 meters deep from 1 to 2 meters away from the base of the mother bamboo, and applies the fertilizer to the soil after the application. The latter is a ditch every 2 meters, 30 to 40 cm deep, and the fertilizer is applied to the soil. For example, if the human excrement is applied, a soil pit of 30 cm deep is dug in an uphill slope of about 1 m from the base of each mother bamboo stalk, and 4% of human excrement can be applied. Regardless of which method is adopted, the mother bamboo of 3 to 4 years old should be used as the main fertilization target, because the bamboo fertilizer has a high rate of bamboo shoots. When fertilizing, such as soil
Drying and chemical fertilizer application are better than dry application. Deep application is better than shallow application, and composite fertilizer is better than single fertilizer.
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