Autumn is about to begin, and fertilization has become a hot topic of discussion among farmers. The author finds that because there are some irrational places for many farmers' fertilization habits, serious waste results. The main points of fertilizing autumn corn are summarized below for your reference. Basal fertilizer accounted for about 50% of the total fertilizer, basal fertilizer generally applied or acupuncture points. Applying a proper amount of chemical nitrogen fertilizer as seed fertilizer at the time of sowing has a good effect on strong seedlings. Generally, ammonium persulfate or ammonium nitrate 5-7 kg is suitable. Trace element fertilizers are used for seed dressing or soaking. Seeds are coated with 2 to 4 grams of zinc sulfate per kilogram of seeds, and 0.2% of zinc sulfate is used for soaking seeds. Seedlings are usually applied at the 4th to 5th leaf stage of seedlings combined with seedlings (or seedlings), cultivating and weeding, and should be applied early, lightly and partially. Poor site preparation, insufficient base fertilizer and weak seedlings should be applied as soon as possible. If the basal fertilizer is sufficient, the soil is more fat, and the seedlings grow well, then the seedlings may not be chased or traced. Stalk manure, also known as jointing fertilizer, is generally applied at the jointing stage, that is, when the basal internodes begin to grow. It accounts for about 20% to 30% of the total fertilizer, and the stalk manure is dominated by organic fertilizer, with a small amount of fertilizer, generally Each mu of mulching, heaping 1,000 kilograms of manure, or 7 to 10 kilograms of compound fertilizer, should pay attention to weak seedlings, in order to promote the balanced growth of the whole field. Panicle fertilizer refers to the development of the tassel to the tetrad, and the development of the ear to the florets in the differentiation phase. At this time, it is a key period for determining the size of the ear and the number of grains of the ear. Panicle fertilizer should generally be re-applied, the amount of fertilizer is about 60% of the total fertilizer, and quick-acting fertilizer is appropriate. The effect of granule fertilizer is to maintain the root and protect the leaves, prevent premature defertilization of corn in the later period, and extend the functional period of the green leaves to increase the grain weight. The application of granular fertilizer is light and skillful. The amount of fertilizer applied accounts for about 10% of topdressing. If the soil fertility is higher, the basal fertility is better, and the seedling potential is better, the stalk fertilizer can be steadily applied and the panicle fertilizer can be weighed. On the contrary, the stalk fertilizer can be reused and the panicle fertilizer can be less applied. Insufficient panicle fertilizer, yellow-green leaves, and early leaves of the lower leaves, grain fertilizer can be applied more properly; otherwise, you can apply less or not.
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