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Key Technical Points for Summer Corn Planting and Field Management
Most summer corn has already entered the jointing stage to the large trumpet stage; therefore, doing a good job of chemical regulation for lodging prevention at the jointing stage, ear fertilizer application, and pest and disease control is crucial for achieving high corn yields. 1. Scientific chemical regulation. Because the wheat growth period was delayed, corn sowing dates were generally later, and the jointing stage coincided with the rainy season, planting hidden risks for corn lodging. Chemical regulation not only makes corn stalks tough, the root system well developed, and lodging resistance stronger, but also deepens leaf color, thickens leaves, increases chlorophyll content, and enhances photosynthesis. It can generally reduce plant height by 10-15 cm and ear height by 10-12 cm, and can also shorten internodes, shaping an ideal high-yield plant form with good ventilation and light penetration. It plays a role in drought resistance, disease resistance, lodging resistance, and promoting reproductive growth, helping to produce large cobs, more kernels, heavier kernels, and a low bare-tip rate. It increases density by 200-400 plants per mu, with a yield increase generally of 15%-30%, truly achieving “seeking high yield within dense planting.” The time for chemical regulation is generally when corn has 6-13 expanded leaves, and the effect is best at 8-13 expanded leaves. Before the 6-leaf stage, corn leaves are slender and the leaf surface is smooth. When corn reaches the 7-expanded-leaf stage, the leaves become broad and thick, and fine soft white hairs appear on the leaf surface that can be easily felt with the back of the hand; this is the best time to spray chemical regulation agents. For the spray agent, the top choice is Dinongbao, the latest research achievement of the Chinese Academy of Agricultural Sciences.</p><p>2. Topdressing ear fertilizer. During the ear stage, the absorption of mineral nutrients is greatest and the absorption intensity is highest; this is the period when corn absorbs nutrients fastest and is also the most important fertilization period in its life. Topdressing nitrogen fertilizer at the large trumpet stage can effectively promote the differentiation of female ear florets and achieve large ears with many kernels. Generally, 20-25 kg of urea or nitrogen-potassium compound fertilizer can be topdressed per mu. The topdressing method can be trenching beside the rows or hole application deep beside the plants, preferably combined with irrigation or applied during effective rainfall. Never broadcast fertilizer on the soil surface to prevent fertilizer loss.</p><p>3. Strengthen pest and disease control. For pests and diseases at the summer corn ear stage, focus on controlling brown spot and corn borer. Brown spot can be controlled by foliar spraying with 12.5% Hexaconazole or 12.5% Triadimefon; corn borer can be controlled at the large trumpet stage by pouring phoxim granules into the whorl or by spraying the heart leaves with 4.5% beta-cypermethrin emulsion or 50% phoxim emulsifiable concentrate. </p>
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What are the field management measures for summer corn in the middle and late stages
1) Timely intertillage and topdressing to meet nutrient needs. During the jointing to small trumpet stage (from 6 leaves unfolded to 10 leaves unfolded), apply fertilizer in combination with intertillage. Through intertillage, destroy wheat stubble, loosen the soil, and control weeds. Topdressing should be mainly nitrogen fertilizer; do not broadcast it on the soil surface. It should be concentrated near the roots
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Key Technical Points for Spring and Summer Field Management of Navel Orange Orchards
Spring comes early in southern Jiangxi, warm and rainy. From March to June, navel oranges are in the phenological stages of spring shoot growth, flowering and fruit set, and the first and second physiological fruit drop. This is also the dangerous period when more than 10 kinds of pests and diseases, such as citrus flower bud midge, mites, scale insects, tortrix moths, longhorn beetles, anthracnose, resin disease, and canker, rapidly multiply, spread, and proliferate.
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Chestnut Expansion Period Management Methods and Key Points
Timely fertilization In summer and autumn, apply fertilizer to the roots once a month, mainly nitrogen, phosphorus, and potassium fertilizers. For trees with a per-tree yield of 50 kg or more, apply 0.75-1 kg of urea, 0.5-0.7 kg of monopotassium phosphate each time, or apply 1-1.5 kg of nitrogen, phosphorus, and potassium compound fertilizer, broadcast after rain or
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Key Technical Points for Summer Training and Pruning Management of Pear Trees
The training and pruning of pear trees is an important measure in cultivation management, and also a very meticulous task. Training is based on the pear tree's growth and fruiting habits, growth and development patterns, site conditions, and other cultivation management characteristics. Pruning, on the basis of training, continues
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Key Technical Points for Summer Training and Pruning of Cherry Trees
Pinching is the most widely used method in summer pruning of cherry trees; it refers to removing the tender shoot tip before the new shoot has become lignified. Pinching young trees encourages more shoots to sprout, lowers the position where shoots emerge, rapidly increases the number of branches and leaves, expands the canopy, reduces ineffective growth, and promotes flower bud formation.
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Detailed Explanation of Key Techniques for Summer Management of Plum Trees
1 Summer pruning 1.1 Bud rubbing and shoot removal. Removing buds immediately after they sprout is called bud rubbing; when the sprouted buds develop into tender shoots, cutting or pinching them off is called shoot removal. 1.2 Pinching. Pinching can be done when new shoots grow to 10~15 cm. The number of pinchings depends on the tree's vigor and requirements
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Key Management Techniques for Summer Soybean in the Mid-to-Late Growth Stage
Compared with corn and cotton, soybean requires less labor, less investment and lower cost during its growth period, which is a major advantage of the summer soybean crop, but for soybean to achieve high yield, mid-to-late stage management is the key. During the flowering and pod-setting stage, vegetative growth and reproductive growth proceed together, which is
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Angelica dahurica Cultivation Experience and Key Planting Techniques
This spring and summer, the nationwide climate has been abnormal, with large areas affected by drought and long duration. Angelica dahurica production has been affected to some extent. Currently, the market supply of new goods is low, and most of the supply has been purchased by medicine dealers in the production areas. The movement of old stock has also turned from sluggish to smooth. Angelica dahurica prefers a warm and humid climate and an environment with
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A Detailed Explanation of Key Apple Tree Management Techniques in Midsummer
August is the peak period of flower bud differentiation and rapid fruit enlargement in apple trees, and also the peak period for the occurrence and development of pests and diseases; tree management during this period is very important, and the key management points are summer pruning, pest and disease control, topdressing, weeding and drainage.
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