1. What issues should be paid attention to when applying chemical fertilizers?
① It is not advisable to water immediately after using urea;
② Ammonium bicarbonate should not be applied on the soil surface;
③ Ammonium bicarbonate should not be used in greenhouses and greenhouses;
④ Do not mix ammonium nitrogen fertilizer with alkaline fertilizer;
⑤ Do not apply nitrate nitrogen fertilizer in rice fields;
⑥ Ammonium sulfate should not be used for a long time;
⑦ Phosphate fertilizer should not be applied dispersedly;
⑧ Potassium fertilizer should not be applied in the later stages of the crop;
⑨ Chlorine-containing fertilizers should not be applied alone for a long time, and should not be applied to chlorine-resistant crops;
⑩ Nitrogen-containing compound fertilizers should not be used in large quantities on leguminous crops.
2. How to use farmyard fertilizer correctly
① Compost
Compost is an organic fertilizer made from various crop straws, weeds, garbage, peat, green manure, mountain surfaces, turf and other organic matter and human and animal excrement. Compost is a complete fertilizer rich in nitrogen, phosphorus, potassium and organic matter. It is suitable for various crops. Since it can be applied to the soil to loosen the soil, it is best applied to root and tuber crops. Compost is a slow-acting fertilizer and should be used as base fertilizer but not as top dressing. It can be used according to local conditions, and it is best to combine it with spring and autumn plowing as base fertilizer. When used as base fertilizer, it is generally applied during soil preparation so that it can continue to decompose in the soil and release nutrients for crops to absorb and utilize.
② Waterlogged compost
Waterlogged compost is a fertilizer made by mixing crop straw, weeds, soil, garbage, human excrement, livestock excrement and other organic matter, and decomposing it by anaerobic microorganisms under flooded conditions. Compared with compost, waterlogged compost is decomposed under relatively low temperature and anaerobic conditions. It decomposes slowly but loses less organic matter and nitrogen, and accumulates more humus. When applied, it is generally used as base fertilizer, and if it is well decomposed, it can also be concentrated in ditch application or hole application.
③ Green manure
Green manure is best used as base fertilizer or top dressing for leguminous crops, using the nitrogen-fixing effect of rhizobia to improve soil fertility.
④ Barnyard manure
Barnyard manure refers to the fertilizer made by stacking the excrement and urine of pigs, cattle, horses, sheep, chickens, ducks and other livestock and poultry with straw litter. It is divided into livestock manure and poultry manure.
