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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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How to prevent corn herbicide damage? A detailed guide to practical methods
In order to prevent herbicide damage, application techniques must be strictly followed and operations must be standardized. 1. According to the corn crop and the target to be controlled, select the appropriate herbicide, and based on the instructions on the label, clarify the product name, formulation, active ingredient content and application rate. In
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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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Experience in corn cultivation with plastic film mulching, suitable for corn fields in mountainous areas
In response to the relatively severe drought in Taiyi Township, Dali City since last year, adopting plastic film mulching cultivation is an effective way to ensure drought resistance, seedling survival and increased income for corn. Corn plastic film mulching has the following effects: (1) Temperature increase: daily temperature increases by 3.9°C at the seedling stage, 3.3°C at the jointing stage, and at the tasseling stage daily
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What are the key technical measures for increasing yield in the late growth stage of corn?
To achieve high corn yields, the following four key techniques should be carried out in the late growth stage. 1. Pull out barren stalks. After the booting stage of corn, time should be taken promptly to pull out the barren plants that have weak growth, slender stalks, and either no ears or ears that cannot grow large and do not silk, pollinate, or set seed.
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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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Detailed Explanation of the Layering Method for Asexual Propagation of Cornus officinalis
Cornus officinalis, also known as Zaopi, Yaozap, Shuzap, and the fruit peel after pit removal is called Shanyurou or Yurou, is a woody Chinese medicinal herb unique to our country, with wide uses, and its medicinal value, economic value and ornamental value are all very high. It has long been a scarce medicine in domestic and international pharmaceutical markets, and in recent
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A detailed guide to dogwood (Cornus officinalis) seedling-raising techniques, teaching you how to grow dogwood well
1. Seed treatment: In September-October, collect mature dogwood seeds and wash them clean with clear water. Fill a water vat with 2 parts boiling water plus 1 part cold water, filling it to 1/2 of the vat. Pour the washed seeds into the vat, stir slightly, soak for 24-48 hours, then remove and spread them on a concrete floor to dry in the sun.
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Vegetative Propagation Methods in Cornelian Cherry Cultivation
When Cornelian cherry is planted as seedlings grown from seed, only 6-year-old seedlings can flower and bear fruit, whereas planting with vegetatively propagated seedlings can maintain the superior traits of the mother plant, and they generally flower and bear fruit in 4 years. Common vegetative propagation methods include cuttings, grafting and layering. 1. Cutting propagation Generally from April to
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Soil improvement methods for Cornus officinalis planting
For Cornus officinalis woodland, the operation of turning under green manure should be done well, which can reduce soil moisture evaporation, store water and preserve moisture, and can also increase soil organic matter content, playing a role in fertilizing the soil. For planting sites with relatively large slopes, the work of earthing up tree plates should be done well,
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