Types of fertilizer in planting time, a small amount of fertilizer to light applied in the seed near the fertilization methods. Kinds of fertilizer is to ensure that the spring crop seedlings Qimiao strong, the amount of not more, types of fertilizer nutrients in the ratio of phosphorus-based, with a small amount of nitrogen, a common fertilizer varieties based on phosphorus-based, with a small amount of nitrogen, commonly used fertilizer varieties DAP. The number of types of fertilizer, while small, but skillfully deflected the question, "can play a role.
Fertilizer's key is in addition to master the appropriate number, but also pay attention to fertilization location, a small amount of fertilizer should be applied in the seed oblique 3 to 5 cm below the fertilizer should not be close to the seed, otherwise, even if the number of suitable, or it may burn seedlings . Conditions of mechanical planting to seeds and fertilizers from two reserve tanks and two seed tubes sown, so that fertilizer and not in the same plane in order to ensure the safety of emergence.
Not all nitrogen fertilizers are suitable for the kinds of fat, it is necessary to strictly control the types of fertilizer nitrogen application, but also to select the nitrogen fertilizers. Elemental nitrogen, ammonium sulfate suitable for the types of fertilizer, ammonium bicarbonate, ammonium chloride, ammonium nitrate and urea are not suitable. In recent years, around the improper kind of fertilizer application to burn seedlings rotten lesson worth learn. For example, the tower high nitrogen fertilizer kinds of fertilizer, where a larger amount (over 10 kg / acre) and fertilizer buried deep, have varying degrees of inhibition of seedling growth. Fertilizer diammonium phosphate for the kinds of fat as well, the emergence of security, seedling growth robust.