How to fertilize different soils

Sandy soil: The soil is sandy, loose in soil, and has many coarse grains. The performance of the capillary tube is poor, and the fertilizer and water are easy to lose. The potential nutrient content is low. This type of soil should be applied more organic fertilizer, such as soil miscellaneous fertilizer, straw returned to the field, or a kind of green manure fertilization fertility timely, and gradually improve the soil properties. Topdressing fertilizers should pay attention to: First, the application of fast-acting fertilizers, to facilitate rapid crop absorption, to avoid loss of fat after the rain or flooding; Second, it is appropriate to "eat less meals," appropriate increase in the number of fertilizers, so that can meet different crops The need for fertility during the growing season can reduce the loss. The third is the use of concentrated fertilization methods such as furrows or holes, and the fourth is the method of soil fertilization, which can preserve the nutrients and improve the soil. Clay: This kind of soil has heavy texture and strong fertility and water retention capacity, but its permeability is poor and its fertilizer efficiency is slow. Therefore, the application of organic fertilizer must be fully brewed and decomposed, the topdressing of chemical fertilizers should be appropriate early, and should "eat more meals," appropriate to reduce the frequency of fertilization, the late bogey over-application of nitrogen fertilizer to prevent sluggish crop maturity. In addition, cultivating loose soil and improving soil ventilation should also be carried out. Loam: A soil with good agronomic traits. Its permeability, conservation, potential nutrient content between sand and clay, suitable for all types of crop growth, generally according to output requirements and crop appearance, timely and appropriate fertilization. However, it is also necessary to apply rationally, fertilize fertility, and better play the role of increasing fertilizer production. In principle, it is necessary to combine long-acting fertilizer with short-acting fertilizer to meet the fertilizer demand in different growth periods of crops in a timely manner. Organic and chemical fertilizers are combined to fertilize the soil and be used for the same purpose; a large amount of fertilizer and micro-fertilizer combine to provide the plant in time. All kinds of nutrients needed; nitrogen, phosphorus and potassium combine to increase efficiency. Soil pH has great influence on nutrient availability and is an important basis for rational fertilization. According to the analysis, PH6? 8 partial alkali soil, available nitrogen content is relatively high, so the application of ammonium nitrogen (such as ammonium bicarbonate, ammonium sulfate, etc.), should be applied acupuncture, ditch and basal deep application, such as methods to cover the soil. To prevent or reduce ammonia volatilization. In acid soils below PH6, potassium, calcium, etc. are easily replaced by hydrogen ions and they are lost with water. Therefore, in the acid soils, potassium and calcium should be added. The effectiveness of phosphorus is more susceptible to pH, and when PH6?7?5, the effectiveness is higher; when PH7?5 is below, it is easy to combine with calcium in the soil and become insoluble calcium phosphate; PH6 or less, Easily combined with iron and aluminum in the soil to form insoluble iron phosphate, aluminum phosphate and other compounds. Therefore, in the application of phosphorus in acidic soils, it is advisable to apply lime to neutralize the acidity of the soil.

Medical Sealing Machine

Medical Sealing Machine,Chamber Vacuum Sealer ,Impulse Sealer ,Industrial Vacuum Sealer

Disposable Medical Supplies Co., Ltd. ,