In recent years from May to July each year, day lily "three diseases" (referring to leaf blight, leaf spot, and rust) are all very popular and seriously threaten the production of day lily. This year, the author's investigation found that: Huangcai field, which is poorly managed by Dongpei, is even more popular in May. The scope of production cuts is surprising.
Huanghua Dongpei management is good or bad, and it is very important for the disease. Dongpei mainly includes winter fertilizer and rhizosphere soil. Shi Dong Fei's time should be stagnant on the ground above the lily growth, that is, when the fall withering after the frost. Winter manure should be dominated by organic fertilizer, and the amount should be more. Application of 2500 kg per acre, can be applied between the plexus, can also be 10-20 cm in the line between the rows of plants, open width 18 cm, depth 15 cm fertilization point, deep application, after the cover soil to improve fertilizer efficiency , for day lily bolting reserve sufficient nutrients. After the day lily enters a prolificacy period, the roots are well developed. If no roots are cultivated, the roots will be exposed. Not only the absorption of fertilizer and drought resistance will be greatly reduced, but also the plant parts on the ground will be underdeveloped, and the yield will obviously decline. In the farmland, there is "Wenpeiyu, bud oil; Chunpeiyu, shaved bone." There is also the saying that "the winter tube culture is one inch high and the disease is three-points lighter the following year."
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