Strengthening the classified Management of Cotton after Rain
In view of the current complex situation of cotton seedlings, in order to promote balanced growth and enhance stamina, corresponding measures should be taken to classify and guide, strengthen management, and strive to resist disasters and win a bumper harvest.
First, seize the season and fatten up as soon as possible. It is the main contradiction of cotton management to apply fertilizer quickly and quickly, but it should be classified and implemented. It is necessary to apply flower and boll fertilizer to cotton that has blossomed and set bolls, applying 15 kg of compound fertilizer, 10 kg of urea and 15 kg of potash fertilizer per mu. For cotton entering the full bud stage, 2000 kg of mature organic fertilizer per mu, or 50 kg of bio-organic compound fertilizer, 15 kg of inorganic compound fertilizer, 15 kg of potash fertilizer, and 10 kg of urea should be supplemented for cotton that has not yet budded, mainly urea or ammonium bicarbonate, to promote rapid transformation and upgrading of cotton seedlings, and 200 kg of boron per mu for serious boron deficiency. 0.2% Suele boron was sprayed 3 times.
Second, ploughing and breaking boards to get rid of weeds quickly. Cotton fields are generally hardened after rain, affecting the development of cotton roots, first, manual weeding, second, quick-use machinery to cultivate soil, and third, chemical weeding. The method of directional spray can be used to spray 10% glyphosate or 20% paraquat in the wide row of cotton, the former 300ml / mu, the latter 200ml / mu, weeds above 6 leaves can be appropriately increased. After applying this kind of herbicide, do not flood irrigation in case of drought.
Third, prevent prosperity and pay attention to insect pests. After topdressing cotton, if there is moderate rainfall, it is easy to cause vigorous growth or even crazy growth. The choice of plant growth regulator should be delayed zhuangxin or metoprolol. At this time, the dosage can be 6ml / mu or 1.5-2g / mu, preferring a small amount for many times rather than increasing the dosage blindly. In recent years, although the increase of cotton plant height has been controlled by some farmers, the boll setting ability has decreased sharply, and this lesson should be learned. Insect pests, the first to bear the brunt of the bug bug, should choose to kill bug bugs, 2% methylaminoavermectin benzoate, 5% fipronil suspension and other control.
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Resolutely relax the small row spacing of cotton-- the second suggestion of consultation service in rural areas in 2008
Before sowing, the author visited some cotton areas in Hebei, Shandong, Shanxi and Shaanxi and found that the small row spacing of cotton in most areas was too narrow, which seriously hindered the normal growth and development of cotton plants, so planting reform must be carried out from the population structure. The top priority is to relax the small line spacing. In order to cover cotton with plastic film, cotton farmers mostly use large and small rows to sow seeds, one sowing two rows. In most areas, 90 cm wide plastic film is used, and the width of small line spacing is about 45 cm. This is not conducive to the normal elongation of fruit branches and flowering bolls, but also the formation of unbalanced growth on both sides of cotton roots. Very
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Jimian 25 (cotton)
Jimian 25 is a new high-quality and disease-resistant mid-early maturing upland cotton variety bred by Cotton Research Institute of Hebei Academy of Agricultural and Forestry Sciences through interspecific hybridization, backcross and double crossing of upland cotton, Asian cotton and wild cotton. The parent is [Jimian 8 × (4086 × Shiser)] × (Jim182 × Zhonglu 85-2-1). Characteristics of Cotton Research Institute of Hebei Academy of Agricultural and Forestry Sciences the growth period of this variety is about 125 days. The plant height is 88 cm, the plant type is moderate, and the seedling emergence is fast.
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