Shortening the symbiosis period of cotton and watermelon is a major basis for species selection. The middle and early maturing varieties of watermelon are selected, and the high-yield insect-resistant cotton varieties with large plant type, strong growth, and no premature failure are selected for cotton. The sowing date of watermelon is around April 15th. The ground temperature of 0-10 cm is stable above 13°C. The cotton sowing date is around April 25, and the 0-5 cm ground temperature is stable above 15°C. Watermelon and cotton have two membranes. The distance between the two membranes is 70-80 cm. Around April 15th, each row of watermelons is planted with a row of watermelons. The row spacing of watermelons is 150 cm, the spacing between plants is 40 cm, and the density of mu is 1,100. Around April 25th, a row of cotton or two rows of cotton was planted on the watermelon membrane, such as a row of watermelon intercropping cotton, the cotton spacing was 20 centimeters, a row of watermelons interplanted two rows of cotton, the cotton spacing was 40 centimeters, the cotton density was 2000, and the percentage was occupied by cotton. Sowing, 2-3 tablets per hole, 2-3 cm deep. Re-apply basic fertilizer, apply 4-5 cubic meters of rough fat, 25 kg of diammonium phosphate, 25 kg of ammonium bicarbonate, and 10 kg of potash, combined with even spreading in early spring. After the flowering of cotton, the demand for fertilizer gradually increased. Before the flowers were seen in the cotton field, 25 kg of special fertilizer for cotton and 5 kg of urea were mixed to make up for the shortage of phosphorus and potassium fertilizer in the middle and later stages to prevent the premature decline of cotton production; The stick blinks, or opens a hole deep in between adjacent cotton plants. Before ripening watermelons, it is the period of peak fertilizer demand, accounting for more than 70% of the total. When the melon size of watermelon is sitting on the melon, 10-15 kilograms of urea can be topdressed in time, which is beneficial to the enlargement of watermelon and the increase of yield. The method of applying fertilizer can be applied to point chase or liquid dressing device. In mid-July, after the end of the watermelon harvest, combined with extermination earthworms, acres of urea 10-20 kilograms, promote the growth and development of cotton, put a good production frame. Increase the bell strength in the middle and late period. Fertilization methods: flooding and spreading, spreading trenches, combined irrigation can be applied. Into the early August if the phenomenon of premature aging of cotton in time to make up for cover top fertilizer, usually urea urea 7.5-10 kg. About 1500 strains of middle-early maturity variety, it is recommended to adopt three-vine pruning method: that is, to keep the main vines and the base of the two robust lateral vines; per unit of 350-400 grafted watermelon, multi-vine pruning method should be adopted: that is, to retain the main vines. With three robust side vines, all the excess melon vines are removed. At the same time as squeezing, we must manage guava 3-4 times, so that the melon vine spreads evenly, inhibits prosperous growth, and is conducive to the growth of melon and cotton. Watermelon is dioecious, pollinating by insects, insects for flowers. Transplanting mulching watermelon early growth period; low flowering temperature, insects, insect pollination alone rely on a lower rate, the implementation of artificially assisted pollination; can increase fruit set rate of more than 80%. Pollination time 6-8 am, cloudy days can be postponed to 10 o'clock. The pollination method is very simple: take a male flower to remove the petals: open the pollen and gently apply it on the stigma of the female flower. A male flower can grant two female flowers. Positioning and fruit setting is to position the watermelon sitting on the second female flower of the main vine or the first female flower of the side vine. In principle, one watermelon and one watermelon are required to achieve consistent ripening of the watermelon and timely harvesting; In the late growth and development. When the seventy-eight true leaves of cotton begin to bud, they must go to the leaf branch twice in a timely manner to grow the flourishing cotton field. Always wipe off the axillary buds and reduce nutrient consumption. Hit the cotton top on July 20-25, August 20. Remove all the side of the fruit branch, hidden cotton fields, promptly knocked down the old leaves, cut the empty fruit branches, in order to facilitate air ventilation, reduce the bad bell. Insect-resistant cotton is not insectless. Although cotton bollworm and red bollworm have been controlled, tigers, cotton-thick pupa, cotton aphid, and red spider need to be controlled, especially in the past two years, the number of insect pests in cotton fields has decreased by 2/3. In addition to the climatic factors, the occurrence of cotton-blind crickets is emphasized. The young pods are shed in large numbers and have a great impact on cotton; the individual cotton fields have reduced production by 4-6 percent. Therefore, it is necessary not only to pay close attention to the local cotton stations to publish worms, but also to prevent and control pests. Identify the characteristics and habits of various types of pests, and investigate the effects of prevention and control. Melon cotton early stage due to the impact of watermelon, cotton growth is slow, plus line width, thin lines, control light from the general; two times: the first flowering mu spray contraction amine 1 g watered 15 kg, the main role of deployment of nutrients, After 5-7 days of cotton topping, if the stormwater is in many years, the amount of 2.5--3 grams per acre sprayed with dilute amines, 20-25 kg of water, inhibiting growth and increasing the rate of ringing. "Wall Mounted Seat,Wall Mounted Shower Bench,Wall Mounted Fold Down Seat ,Teak Fold Down Shower Seat" Active Life Healthcare Co.,Ltd , https://www.alh-med.com