Re-apply Hua-Bing fertilizer, make top-dressing fertilizer to facilitate the management of cotton later, mulch cotton should be in the flowering of the plastic film removal, and immediately top-dressing, pay attention to watering during drought. Using plastic film covering and nursery transplanting cotton, re-apply early flowering fertilizer (see flower heavy fertilization), its fertilization amount accounts for about half of the total top-dressing fertilizer; live cotton re-applied full bloom fertilizer (see peach heavy fertilizer). Early spring cotton develops early, in order to prevent premature senility, it can be applied top dressing fertilizer about 10 days after applying flower bell fertilizer. Mushi urea is about 5 kilograms.
In case of drought and watering, the waste cotton will enter the flowering stage, and it will not be drought-resistant or tolerant. In the event of drought or guilt, it often causes a large number of bee bells to fall off; generally, the soil moisture content in the cotton field is 20-40 cm, which is lower than the field water capacity. When it is %, it should be watered, and the amount of watering should be 30-40 cubic meters per mu.
The cultivating and cultivating soil cotton bolling period is in high temperature and rainy season, and it is easy to cause cotton field compaction. The timely cultivating can loosen the soil and promote the physiological activity of the root system; the cultivator should not be too deep, and the 6 to 7 cm is better.
Rationally control the growth of the cotton field, in the early flowering period, sprayed 2 grams of methamphetamine or 25% of the helper factor 8 ml, full flowering acres sprayed 3 grams of salicylamine or 25% of the helper factor 12 ml, to ensure that plants grow steadily.
Timely topping usually high yield cotton field topping on July 15th ~ 20th, individual development late, strong growing cotton field, hitting the top before July 25th; topping prematurely, with less effective branches, axillary bud clusters, and upper part Fruiting branches are too long to be conducive to air ventilation and bells in the field. If they are too late, they will easily cause upper empty branches and the lower part of the bell will fall off, which is not conducive to high cotton yield.
The insect pests that damage cotton during scientific flowering and boll stage are mainly Fuxi and three generations of Helicoverpa armigera; the planting rate of Fuxiu reaches up to 5% and the resistance of cotton bollworm to up to five in one hundred newly hatched larvae.
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