Corn's "drought before drought" management measures need to keep up

This year, some of the major corn producing areas suffered from persistent high temperatures and droughts, relatively poor climatic conditions, long maize seeding periods, and corn seedlings all affected by drought. The work of planting and checking seedlings for maize was extremely burdensome. Since July, excessive rainfall in the main maize production areas has brought damage to the growth of seedlings and jointing stages. Maize is a crop that requires a large amount of water but is not tolerant. When the soil moisture exceeds 80% of the maximum water holding capacity, the corn is stunted, especially in the corn seedling stage. After the emergence of corn seed, the earlier the damage occurred, the heavier the damage will be. The longer the flooding time, the heavier the damage will be, and the deeper the flooding will be, the heavier the damage will be. After the emergence of corn damage, remedial measures should be taken as soon as possible to minimize the damage.

Drainage and drainage shall be used to clear Tiantougou, Weigou, and Yaogou, remove water in the field, reduce soil moisture, and achieve the purpose of energy drainage and energy reduction.

Soil erosion due to cultivator scars can cause soil compaction and poor permeability, affecting crop root respiration and nutrient absorption. After the precipitation, the soil in the field must be cultivated in time to loosen the soil, remove the soil compaction, promote soil ventilation, improve the rhizosphere environment, and promote root growth. Lodging corn seedlings should be timely and righteous.

Earlier application of Miaofei and jointing and panicle-growth fertilizers require larger amounts of crops. The loss of soil nutrients due to alfalfa damage is serious and the seedlings are weak. It is necessary to top up the seedlings in a timely manner (15 kg of urea per mu and 20-30 of compound fertilizer. Kilograms), large bell-mouth period of 20-30 kg of urea per acre. For fields that are flooded for long periods of time and are heavily polluted, high-efficiency foliar fertilizers (1% urea plus 0.2% potassium dihydrogen phosphate) and root-removing agents are sprayed while fertilizing to promote recovery.

When applying a partial fertilizer drought, the phenomenon of maize reseeding and supplementing seedlings is prominent. The growth of corn seedlings is uneven and the weak seedlings are given more fertilizer once.

Strengthen pest and disease control Due to the accumulation of water in the field, the soil moisture is saturated, the air humidity is high, and various pests and diseases such as gray spot disease, spot disease, and corn borer are prone to occur. When spraying foliar fertilizer, pest and disease control can be carried out at the same time. Corn mash was treated with 0.3% phoxim granules or 4.5% beta-cypermethrin 1500 times. Corn chlorosis was treated with 70% thiophanate-methyl 1200-fold. Corn big and small spot disease was sprayed with 50% carbendazim WP 500 times; 70% thiophanate-methyl wettable powder 600 times spray; 75% chlorothalonil wettable powder 800 times spray Prevention.

Harvesting in stages caused poor seedlings, replanting seedlings, and supplementing seedlings. The growth and development of the corn lag behind that of early emergence. The first mature corn should be harvested first, and do not wait until harvesting to prevent early mature corn rot.

Replanting and replanting other economic crops will require replanting or replanting of other economic crops in time after the disaster.

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