Fertilizer Can Not be Applied in This Way

1. Fertilizer shallow fertilizer is easy to volatile, lost or difficult to reach the roots of the crop, which is not conducive to crop absorption, resulting in low fertilizer utilization. Fertilizer should be applied at 16~26 cm below the seed or plant side.

2. Double chlorine fertilizer with ammonium chloride and potassium chloride production of compound fertilizer called double chlorine fertilizer. Contains about 30% chlorine, easy to burn seedlings, to be watered in time. Saline land and crops sensitive to chlorine can not be applied with chlorine-containing fertilizers. Excessive application of potassium chloride to leaf (stem) vegetables, etc., not only causes vegetables not fresh, more fiber, but also makes vegetables taste bitter, poor taste and low benefit. Urine-based compound fertilizer contains high nitrogen, shrink diurea also contains slightly higher nitrogen, easy to burn seedlings, pay attention to watering and fertilization depth.

3. Crops with improper fertilizer, may cause fertilizer damage, the occurrence of burning seedlings, plant atrophy and other phenomena nitrogen fertilizer in excess, there is a large amount of ammonia and ammonium ions in the soil, on the one hand, ammonia volatilization, met with airborne fog droplets to form alkaline droplets, burn crops, scorched spots on the leaves; on the other hand, ammonium ions in dry soil easy nitrification, under the action of nitrosative bacteria into nitrosammonium, gasification produces nitrogen dioxide gas The crop will be poisoned, in the crop leaves appear irregular water-stained plate, between the veins of the leaves gradually become white.

4. Excessive application of a nutrient will not only be toxic to the crop, but also prevent the crop from absorbing other nutrients, causing disease.

5. Fresh human manure and urine directly applied to vegetables fresh human manure and urine contains a large number of germs, toxins and parasitic eggs, if not ripened two directly applied, will contaminate vegetables, easy to infectious diseases, need to be composted by high temperature fermentation or harmless treatment before application.