How to take measures to shorten the growth period of soybean
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When the soil is sown in soybeans, deep loosening or plowing before shoveling.
Second, artificial hands between seedlings. For soybeans that are not on demand, artificial seedlings are to be planted. Before the first compound leaf is unfolded, it is required to set seedlings once.
Third, increase spade times. For the first time, the spade and saplings are carried out at the same time and the scorpion is 15 cm deep; the second spade is not later than the branching stage, and the scorpion is 10-12 cm deep; the third spade is finished before the full flowering period and the scorpion is 10 cm deep. Left and right, at the same time to earth to the first complex leaf festival.
Fourth, pest and disease control. 1 Seedling pest control. 50.7 grams of 40% dimethoate was used per acre, and appropriate amount of water spray was used to control aphids and red spiders; 33.3 grams of 40% dimethoate was used per acre to spray and prevent thrips. 2 control of heartworm. In the early stage of adult use, dichlorvos fumigation, per acre with 80% dichlorvos emulsifiable concentrate l00-133 grams made poison stalk control, or per acre with 2.5% enemy killed milk 20-30 ml, add water 30-40 kg spray control. 3 control of gray spot disease. When the lesions appeared in the leaves in late July, 50% carbendazim WP 66.7 g and 53.3 kg of water were sprayed and sprayed every acre for 10 days.
Fifth, spray soybean growth mediators. 1 Spray soybean photorespiration inhibitor - sodium bisulfite. Sodium hydrosulfite can promote soybean ripening 2-3 days earlier. In the initial flowering period of soybean, 6 grams of sodium bisulfite was used per acre, and 10% of ammonium molybdate was added to 26.7 kilograms of water to spray once, and then sprayed once again at full flowering period. The amount was the same for the first time.
2 spraying triiodobenzoic acid to promote early maturation of soybean 2-7 days. In the middle of July, when it was discovered that there were leggy greediness, spraying triiodobenzoic acid, 5 grams per mu, and 50 kilograms of water.