Shower Faucets,Shower Faucet Set,Bathroom Shower Faucets,Single Handle Tub And Shower Faucet,Bathroom Shower Mixer Taps,Single handle bathtub faucet JIAHAOJIA SANITARY WARE INDUSTRY CO., LTD. , https://www.gagalfaucet.com
2. Nitrogen deficiency, yellow leaf, rapeseed, nitrogen deficiency, plant dwarf, new leaves are slow, leaves are small, generally leaf margin is red, middle is yellow, yellow-yellow leaves are formed, control measures: 8-10 kg of urea per acre or ammonium bicarbonate 20 ~ 30 kg, can also be used 7.5 kg of human excrement with water, can also be used 1% ~ 2% urea solution 50 kg of foliar spray, even spray 2 to 3 times.
3. Phosphorus-deficient purple leaves The rapeseed is very sensitive to the phosphorus reaction and the seedling stage is more prosperous. Phosphorus deficiency in rape can make plants grow slowly, the leaves are small and thick, the number of leaves is reduced, and the leaves and petioles are purple-red, forming purple and red leaves. Control measures: 20 to 30 kg of superphosphate or 6 to 8 kg of diammonium phosphate per mu, or 50 kg of 0.2 potassium dihydrogen phosphate solution can be sprayed on the surface, and sprayed 2 to 3 times.
4. Potassium deficiency brown leaves The potassium deficiency of rapeseed begins with the old leaves and then develops to the new leaves. At the beginning, it is yellow spot, and the edge of the tip of the leaf gradually appears with focal or brown spots; the leaves become thick, hard and brittle, showing a "scalding". Countermeasures: Apply 8 to 18 kg of potassium chloride per mu or spray 50 kg of 0.2% potassium dihydrogen phosphate solution, and spray 2 to 3 times.
5, lack of boron, blue, purple and red leaves, the leaves of rapeseed are rewinded, the rhizome is inflated, and blue-purple spots appear on the leaves. Countermeasure: 80-100 grams of borax per acre for 60-70 kilograms of water spray, even spray 2 to 3 times, can also be combined with top dressing 50-100 grams per acre.
6. Arid light red leaves When rapeseed encounters drought and soil moisture is insufficient, it will make it difficult for the roots of oilseed to absorb water and absorb fertilizer, resulting in slow growth of rapeseed, short plants and pale red leaves. Countermeasures: Watering should be carried out in time, and furrow irrigation should be adopted. Avoid flooding with large water, otherwise it will easily cause rotten roots.
7, the stains of dark red leaves Before the winter, too much rain, or transplanted in the plate field, poor water filtration, causing water damage to the roots of the dead seedlings, the color of the leaves turned dark red, and some will also rotten dead seedlings. Countermeasures: Drain the water in time to reduce the groundwater level. Do a good job of cultivating loose soil, improve ventilation conditions, promote root regeneration, and promote seedling growth.
8. Frost damage to red leaves When the rapeseed suddenly cools below 0 °C in winter, the leaves will be frozen and red. Countermeasures: Combine the cultivating and clearing ditch, cultivate the roots of the soil, and increase the application of organic fertilizer to reduce the occurrence of freezing damage.
9. Pests of red leaves Rapeseed is seriously endangered by aphids during growth, which can also cause redness of leaves and atrophy of leaves. Countermeasure: use 50% anti-Converse WP 15g or 2.5% enemy to kill 30ml per acre, spray 50kg with water.
Article source: "Friends of the Farm"
Causes and Countermeasures of Red Leaves in Rape
1. Miao Mi Hongye Live or multiple plants said that the density of planting is too large or malnutrition per plant, resulting in redness of seedling leaves. Control measures: Immediately seedlings, go to the dense and thin, go weak and stay strong, and apply 1 or 2 times of quick-acting fertilizer, 5 to 8 kg of urea per mu, or 400 to 500 kg of thin manure, to promote seedling growth.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】