Fertilization of ginger growing period

On the basis of the application of the base fertilizer, the topdressing is done a small number of times, and the NPK is used together. The seedling stage is mainly light and light fertilizer, and the ginger is inflated during the expansion period, and the amount of fertilizer can be appropriately increased in the middle and late stages of rapid expansion of ginger. There is a second important fertilization period in the life of ginger. The first is to enter the fourth stage from Sun Mei period. It is the peak period of the absorption of ginger in the whole life. The absorbed nitrogen, phosphorus and potassium are 52.5%, 12.5% ​​and 30.5% respectively. The time is about June; the second is between August and September, the climate is getting colder, and the temperature difference between day and night is large. This is the golden time for the ginger to expand rapidly. It is necessary to use the rainy days to increase the amount of fertilizer. This is the second key application of fertilization with imported compound fertilizer. Urea application is good, in fertilization, if it is too dry, it is better to take water.

The rhizome of ginger absorbs less nitrogen, phosphorus and potassium in the seedling stage. The absorption of phosphorus increases slowly during the vigorous growth period, and the demand for nitrogen and potassium increases sharply, especially in the early stage of vigorous growth. In the middle and late stages of the vigorous growth period, nitrogen is more than potassium, and potassium is absorbed more than phosphorus. Therefore, in production, formula fertilization according to the fertilizer requirement of ginger, timely application of nitrogen fertilizer can help increase production.

The fertilization of ginger is divided into base fertilizer and top dressing. The base fertilizer is divided into organic fertilizer, cake fertilizer and fertilizer. Organic fertilizer is applied in combination with the ground before planting. Generally, 5-8 square meters of high-quality decomposed chicken manure is applied per acre. Rotary tillage after application; cake fertilizer and fertilizer are concentrated in the ditch, that is, the crushed cake fertilizer and fertilizer are concentrated into the seeding ditch before sowing. In general, 75-100 kg of cake fertilizer per acre, 50 kg of nitrogen, phosphorus and potassium compound fertilizer or 25 kg of urea, superphosphate and potassium sulfate.

In addition to applying the base fertilizer, it is generally carried out three times. The first time chasing "strong seedling fertilizer": the seedling growth period is small, the fertilizer is not much, but the seedling growth period is long, in order to promote the growth of seedlings, usually 30 cm in height, with 1-2 branches Carry out the first top dressing. This time, the topdressing fertilizer is mainly nitrogen fertilizer, and 20 kg of ammonium sulfate or diammonium phosphate can be applied per mu. If the sowing date is too early and the seedling period is long, it can be fertilized 2-3 times with watering, and the amount of fertilization is the same as above.

The second time chasing "turning fat": before and after the beginning of autumn, this is the turning point of ginger growth, and also the turning point of absorption of nutrients. Since then, the growth of plants has accelerated, and a large number of nutrients have accumulated to form product organs. Therefore, the demand for fertilizer and water is increased, and in order to ensure high yield of ginger, the ginger field is weeded before and after the fall, and the second top dressing is carried out. This top dressing plays an important role in promoting hair growth and rhizome enlargement. This time, the topdressing fertilizer generally combines the nutrient fertilizer or the long-lasting farmyard manure with the quick-acting fertilizer. 70-80 kg of crushed cake fertilizer per mu, 3-4 squares of decomposed chicken manure, 50-100 kg of compound fertilizer or 20 kg of urea, 30 kg of diammonium phosphate, 50 kg of potassium sulfate, and plants on one side of ginger seedlings Open a fertilization ditch at 15 cm from the base, spread the fertilizer into the ditch, mix it with the soil, then cover the soil, seal the soil, and finally pour the water.

The third time chasing "Zhuang Jiangfei": In the first ten days of September, when the ginger seedlings have 6-8 branches, it is also the period of rapid expansion of the rhizome, and the third top dressing can be carried out according to the growth of the plant, which is called "strong ginger fertilizer." ". For ginger fields with low growth or growth and soil with low soil fertility, quick-acting fertilizers, especially potassium and nitrogen fertilizers, can be used in this period to ensure the nutrients needed for roots. Generally, 25-30 kg of compound fertilizer or 2.5 kg of ammonium sulfate and potassium sulfate are applied per mu. For the ginger field with high soil fertility and strong plant growth, less or no nitrogen fertilizer should be applied to prevent stems and leaves from growing and affecting nutrient accumulation.

Zinc and boron fertilizers can usually be used as base fertilizer or top dressing. When the zinc deficiency and boron deficiency ginger field is used as the base fertilizer, generally apply 1-2 kg of zinc sulfate and borax 0.5-1 kg per acre, and mix evenly with fine soil or organic fertilizer. When planting, apply in the seeding ditch and mix with the soil: For top dressing and foliar application, 0.05-0.1% borax may be used in 50-70 liters per mu, three times in the seedling stage, the hair growth stage, and the rhizome expansion period.