Several problems that should be paid attention to fertilization of red meat pomelo
Posted on
(1) Organic Fertilizers and Inorganic Fertilizers Organic fertilizers are rich in organic matter, nutrients are complete, and fertilizer effects are long, which can significantly improve soil properties. Inorganic fertilizers, though they have rapid fertilizer effects, are nutrient-poor. Therefore, the pomelo garden should pay attention to the application of organic fertilizers, which can usually account for more than half of the annual nitrogen fertilizer and be used together with inorganic fertilizers. Practice has proved that the implementation of fertilizing organic manure in combination with inorganic fertilizers can promote the improvement of ripening of garden soil, and is beneficial to the growth of plants. It is also an important technical measure to correct the granulation of grapefruit juice. (2) Rational fertilization amount and elemental balance application At present, there are two tendencies in the amount of fertilization in the grapefruit production region in China. One is that the fertilization amount is insufficient, resulting in low yield and poor quality; the other is fertilization, especially single application. Individual fertilizers cause abnormal growth results, waste of fertilizer, and pollute the environment. Therefore, a reasonable amount of fertilizer should be grasped based on soil conditions, tree conditions, and the like. It is worth pointing out that there is still a problem of unbalanced nutrient supply in the grapefruit orchards in different parts of the country, which leads to the nutritional imbalance of grapefruit and the increased granulation of juice. Therefore, we should pay attention to the reasonable proportion of various elements in order to maintain the balance of tree nutrients. (3) Fertilizing according to soil properties and fertilizer properties The soil types and traits in the grapefruit production areas in China differ greatly. The appropriate fertilizer types should be applied according to the characteristics of the soil, and the reasonable application amount, period and method should be mastered. The soil fertility of sand is poor, and it should be applied in small increments. Viscous soil has strong fertility, and the amount of one time can be a little more. Saline-alkali soil should not use ammonium chloride, potassium chloride or sodium nitrate, acidic soil application of phosphate fertilizer can use calcium magnesium phosphate or phosphate rock powder, calcareous soil should choose superphosphate, ammonium sulfate and other acidic fertilizers. The properties of various fertilizers vary widely. Organic fertilizers are often used as base fertilizers. Inorganic fertilizers have alkaline and acidic fertilizers. They also have strong volatility or poor mobility in the soil. They should be reasonably applied according to their characteristics. Such as nitrate nitrogen fertilizer, urea, etc. in the soil mobility, can be used in tea shoots, new shoots, young fruit period, the application of nitrogen, and can not be flooded after application; high manganese acid soil, should control the acidic fertilizer (such as ammonia sulfate, ammonium bicarbonate, etc.), otherwise it is easy to increase soil acidification, resulting in manganese poisoning; alkaline soil should avoid the application of alkaline fertilizer to prevent tea tree iron deficiency disease increase; phosphate fertilizer in the soil can be easily fixed, can With organic fertilizer application. (4) Appropriate adjustment of pomelo garden soil acidity The study of Zhuang Yimei et al. (1994) showed that there is a certain phase difference between the pH soil of the orchard soil and the effective content of soil elements, and the soil reaction has a significant effect on the element availability. According to a wide range of investigations and analysis, the suitable pH range of pomelo orchard soil is 5.5 to 6.5 in terms of soil nutrient availability. Therefore, attention should be paid to the reduction of soil acidity in acid red soil or grapefruit garden, especially the appropriate amount of lime to neutralize its acidity. For salty alkaline soil, grapefruit garden, sulfur, gypsum, physiological acid fertilizer and organic fertilizer can be applied. Please login for details