One is to clear the ditch and prevent stains. Clean up the “three ditch†in time to ensure smooth drainage and ensure no water accumulation on the surface after the rain. The second is early application of flower fertilizer. Generally, before the first ten days of March, the rain cover will be applied with 45% of compound fertilizer and 15 kg of urea plus 7.5 to 10 kg of urea. The amount of topdressing in various types of fields should be flexibly controlled according to the seedlings and growth of rapeseed, and the need to construct a reasonable group structure shall prevail. In addition, the hybrid rapeseed that is mainly planted in our province is sensitive to boron. If boron is not applied at the seedling stage, it should be sprayed with 1 or 2 times of boron fertilizer in combination with pest control at the beginning of flowering and early flowering to avoid rape. "Sickness, improve the rate of seeding. If it has been applied in the seedling stage or base fertilizer, it may not be applied. For the dry land with higher elevation, no matter whether the boron fertilizer is applied in the seedling stage, the high-efficiency instant boron fertilizer is applied to the root buds during the flower bud period. The third is foliar topdressing. From convulsion to flowering stage, rapeseed grows vegetatively and reproductively, so it needs a large amount of fertilizer. If the fertilizer is insufficient, the crop is easy to be de-fertilized. In this period, it can be combined with pest control to spray 2~3 times of foliar fertilizer. Huilongbao 80g Ganopfeng 40g (or 98% potassium dihydrogen phosphate 200g) plus Pengfei (20.5% boron water-soluble powder) 30g evenly sprayed. The interval between spraying and spraying is 7-10 days, which can improve the absorption capacity of rapeseed roots and increase the 1000-grain weight. The fifth is pest control. In March, we should focus on the prevention and control of "one insect and one disease" (ie, rapeseed sclerotinia, rapeseed aphids), and reduce the damage of pests and diseases. Prevention and control of Sclerotinia sclerotiorum can be controlled once in the early stage of rapeseed flowering (one branching flowering branch rate is 20-30%) and in the flowering stage (the secondary branching flowering branch rate is about 30%). 50% procymidone WP 50-75 grams, or 50% Kaiser (pyridinamide) 30-50 grams, or 40% sclerotium 120-150 grams, motorized sprayer 30 kg of water, manual sprayer pair 50-60 kg of water is evenly sprayed, and the whole plant of rapeseed should be applied evenly to improve the control effect. When applying the medicine, add 22% Teflon 5 to 10 ml, or 70% Emerald 4 to 6 g to treat the rape aphid at the same time. The fourth is to control weeds. After entering March, rapeseed basically entered the twitching and flowering period. In order to avoid the phytotoxicity of rapeseed, rapeseed field only suggested chemical control of grass weeds to ensure the safety of rapeseed. Controlling a maiden, bluegrass, valerian, etc., can be used in weeds 3 to 5 leaf stage, with 10.8% efficient grass cover 60 ml, or 5% fine grass grass 70-90 ml, 30 kg water After the morning dew is dry, spray with water. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Food Additives,Natural Food Additives,Food Additive Saccharin,Popular Food Additives SHANDONG BAISHENG BIOTECHNOLOGY CO., LTD , https://www.baishengbioproducts.com
March rapeseed field management points