In early April , it was the start-up period of cotton nutrition and nursery in cotton producing areas. However, recent rains and rains have been frequent, and the temperature has changed rapidly and warmly. This has brought great difficulties to cotton seedlings. It is necessary to seize the opportunity, manage the fertilizer and raise the cotton seedlings. .
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   Excluding the waterlogging, the soil tillage layer of the water level seedbed should be deep, the fertility should be above medium, and the bed site of the nursery should be able to drain water; the drainage ditch around the seedbed should be opened, and the water table at the bed site should be reduced to 1 meter. In the following, the cotton seedlings are encouraged to have new roots downwards; the seedbed base cannot be reused, and a new bed site should be selected every year to avoid seedling disease.
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   Prepare enough soil, grab the time to rush to grab the sunny day, grab the cotton seedbed in the place where the cotton field is good for drainage, so that the bed soil can be cleaned by the soil, and the hand is squeezed into a group, and the floor is scattered. After the seedbed soil is well-prepared, the soil can be covered with old plastic film to prevent rain from burying the bed soil. Once the rain stops, you can choose to grab the nutrients and plant them in time.
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   Timely sowing, fertilizer postemergence cotton seedling raising pilot in early April, mid-April assault big broadcast late April planting Shawei. Under the abnormal climatic conditions this year, the seedbed is not convenient to apply the base fertilizer, especially for the application of organic fertilizer. It can be planted first, and then the cotton seedlings are ready to be topdressed after the seedlings are released. After the cotton seedlings are released, the two cotyledons are flattened and used. Thin human excrement is applied. Before the cotton seedlings are transplanted, they will be chased once again to make the manure. No decomposition of human waste farmer may make use of 1% urea solution was uniformly pour 1 or 2 times, or spraying the active liquid fertilizer or Zhuang Fuxing Huimanfeng 1: 500 ~ 1 ~ 2 times 800 times, or green Fen ( 12.5% nitrile and prochloraz emulsifiable concentrate) + sputum ( 0.01% brassinolide) sprayed.
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   Advocating large seedlings and raising seedlings to control the seedlings. The diameter of the nutrient carcass in some cotton areas is about 5 cm. The cotton is very crowded after emergence. In order to cultivate strong seedlings, it is recommended to use large-sized steroids with a diameter of 7 to 8 cm, which can carry more fertilizers, provide more nutrients for cotton seedlings, prolong the time of seedlings, grow a few true leaves, and promote flower buds. Early differentiation to compensate for losses caused by adverse weather.
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   Prepare the bud seedlings, and transplant the so-called bud seedlings. It is the young cotton seedlings that have just opened two cotyledons of cotton seeds. Such cotton seedlings do not need to be used for nutrition, and can be planted directly on the whole seedbed. The more the soil is finely consolidated, the watering rate is high when transplanting while planting. Any experienced farmer can use bud seedling transplanting, grab the season, transplant the cotton seedlings in time during the best transplanting period, and save the area, and strive to make the whole seedling early.
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(Yu Hongzhang, Senior Agronomist, Agricultural Bureau of Xiaogan City, Hubei Province)
Source: China Agriculture News Net - Farmers Daily
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