Ruian Mingguan Electric Co.,Ltd , https://www.minguanautoparts.com
According to experts, common irrational fertilization phenomena are:
(1) Apply fertilizer lightly. Fertilizers are volatile, lose or hard to reach the roots of crops, and are not conducive to crop absorption, resulting in low fertilizer utilization. The fertilizer should be applied 16D26 cm below the seed or plant side.
(2) Double chlorine fertilizer. The compound fertilizer produced with ammonium chloride and potassium chloride is called double-chlorine fertilizer, containing about 30% chlorine, easy to burn seedlings, and timely watering. Saline-alkali land and chlorine-sensitive crops cannot be treated with chlorine-containing fertilizers. Excessive application of potassium chloride to leaf (stem) vegetables not only causes the vegetables not to be tender and has many fibers, but also makes the vegetables taste bitter, has poor taste, and has low benefits. Urine-based compound fertilizers have high nitrogen content, biuret nitrogen is also slightly higher, and easy to burn seedlings. Pay attention to the depth of watering and fertilization.
(3) Improper application of chemical fertilizers to crops. May cause fertilizer damage, burning seedlings, wilting plants and so on. Excessive application of nitrogen fertilizer, the soil has a lot of ammonia or ammonium ions, on the one hand ammonia volatilization, the formation of alkaline droplets in the air droplets, burn the crop, produce spots on the leaves of burnt; on the other hand, ammonium ions in the dry The soil is easily nitrated and converted into ammonium nitrite by the action of nitrosobacter bacteria. The gasification of nitrogen dioxide gas will poison the crop, and irregular water-stained patches appear on the leaves of the crop, gradually turning white between veins.
(4) Excessive use of certain nutrient elements. Not only does it poison the crops, it also hinders the absorption of other nutrients by the crops and causes detoxification. For example, excessive application of nitrogen can cause calcium deficiency; excessive nitrate-nitrogen can cause loss of molybdenum chlorosis; excessive potassium can reduce the effectiveness of calcium, magnesium, and boron; excessive phosphorus can reduce the effectiveness of calcium, zinc, and boron.
(5) Fresh human waste is applied directly to vegetables. Fresh human waste contains a lot of bacteria, toxins, and parasite eggs. If it is not directly cooked, it can contaminate vegetables and cause diseases. It can only be applied after high-temperature heaping fermentation or harmless treatment.