Seedling stage, birth characteristics
At the stage of seedling tillering, starting from seeding and emergence, until the jointing.
1 Spring wheat emergence - jointing 4 leaves into the young ear elongation.
2 Half-winter wheat emergence - jointing 5 leaves into the young ear elongation.
3 winter wheat emergence - jointing 7-8 leaves into the young ear elongation.
2, cultivation characteristics
1 to Miao Qi, Miao Zhuang.
2 Strive for early branching and early rooting.
3 reached the strong seedling winter.
4 The accumulation of nutrients is more conducive to safe wintering and lay the foundation for increasing production.
3. Management measures
1 Miao Fei: After the seedlings, chase a quick-acting fertilizer to promote the growth of seedlings, early tillering, generally 5-8 kg of urea per acre.
2 points of manure: the amount of fertilizer should not be too much, to prevent long-term before winter, reduce the ability to resist cold, generally 8-10 kg of urea.
3 wax fertilizer: After the winter solstice, generally apply 2000 kg of organic fertilizer, consolidate the tiller before winter, and promote the differentiation of young ears.
4 chemical weeding: after sowing to before emergence, with 25% green meron WP 200-300 g with water 120 kg spray, spray best during rain.
5 pressed wheat: pressed wheat is generally carried out during the winter, the suppression of growth and strong, Wang Miao, control up, shorten the length of the first and second internodes of the stem, increase the thickness, improve the resistance to lodging.
6 defense against freezing damage: the main measures to prevent freezing damage are: use cold-resistant varieties, timely sowing, cultivate strong seedlings, watering before the cold wave to reduce freezing damage.
Jointing and booting stage 1. Fertility characteristics
The jointing and booting stage includes the period of jointing, booting, heading and other growth stages, which is a period of vegetative growth and reproductive growth. When the temperature rises above 10 °C in early spring, the wheat begins to be jointed, and the ticks after jointing are generally ineffective tillers. After the booting is a period of differentiation and partial degradation of florets. Stem and leaf growth were dominant in jointing stage, and stem and ear growth were dominant at booting stage.
2, top dressing
1 jointing period: generally about 15 kg of urea per acre, increasing grain weight gain, preventing premature aging.
2 Booting stage: generally 5-6 kg of urea per acre, increase the nutrient supply of the ear and promote the development of reproductive organs.
3, clear ditch drainage
From the end of February to the beginning of March, wheat began to joint, and the rain gradually increased in March, leading to various diseases of wheat. The wheat field should pay attention to clearing the ditch, reducing the water level and reducing the disease.
4, prevent lodging
1 uses a short rod variety.
2 Rational application of fertilizer water.
3 control is prosperous, when wheat is too prosperous, it can be controlled by chlormequat.
Heading stage of maturity
This stage refers to the period of reproductive growth after wheat heading. Wheat in the middle and lower reaches of the Yangtze River is heading around mid-April, and the heading time is about 40 days. This stage is the period of wheat grain formation and the critical period for determining the number of wheat grains.
2, reasonable irrigation and drainage
After wheat heading, the physiological water requirement increases, which is the peak of water demand in wheat. Generally, the soil water content is about 70% of the maximum water holding capacity in the field. It is rainy in the south in April and May. It is necessary to pay attention to the clearing of the ditch, so that the clear water can be discharged and the dark water can be filtered.
3. Prevention and control of pests and diseases: There are armyworms, aphids, scab, powdery mildew and rust in the late stage of wheat growth.
1 Pests: It can be controlled by pesticides.
2 Diseases: First, the prevention and control of scab. Mixture of carbendazim and trichlorfon can be used. Treating the prevention and control of powdery mildew. The second is the prevention and control of rust. It can be diluted with 200 times of rust sodium or rust acid, and it can be controlled by washing powder 2 .
This article URL: 2016/2017 wheat field management technology summary wheat how to manage the field
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