Some points to note in the management of late-seeding wheat

Due to the late arrival of cotton or the occasional season of wheat sowing, the wheat sown in mid-November is often affected. The characteristics of late sowing wheat in growth and development are as follows: long time of emergence and late emergence of tiller; slow growth at seedling stage, less leaves for overwintering; shorter formation period of stem leaves, lower plant height; fewer grains per panicle, lower grain weight per spike. Appropriate management measures must be taken in order to achieve better yield increase. First of all, late sowing of wheat varieties should pay attention to the flexibility of the selection of the sowing period, and varieties resistant to late sowing, but also coupled with warm soup soaking, fine tillage, shallow sowing, to promote rapid germination early emergence. After emergence, the following management measures should be taken: 1. Top dressing. Late seeding of wheat seedlings at the tip of the three leaves revealed 33.4% of the pups, and they should make full use of and promote the formation of these early pupae. They must strive to ensure that the four puppies are not free before they survive. Therefore, as soon as possible to follow up the seedlings to promote fertilizer, Qimiao timely after the use of clean water dung grafted seedlings, generally 667 square meters with water manure 20 or 5 kg of urea fertilizer. 2, freeze protection seedlings. The less the late-seeding wheat leaves, the later the secondary roots form an independent system, and it is prone to frost damage. Early application of wax fertilizer, before the end of December combined with cultivator loose soil roots, 667 square meters of slag grass or fire and earth fertilizer 50 or so. To protect the seedlings from frost and protect the childbirth. The ditch should be opened to clear the way to prevent darkness. 3, control in defense. Late spring wheat back to green, in the case of fertilizer and water, the leaf speed is faster. It was observed that from the 5th of February to the 5th of April, the timely sowing of the sunrise leaves was 0.07; the late sowing of the wheat was 0.09, and the sowing of the tillers often occurred, and the leaves prospered and the ventilation conditions in the wheat fields deteriorated. Therefore, joint-fertilizer should not be applied prematurely. In the early spring, it is only suitable for plots or patches with particularly poor growth, and it is appropriate to make up a little fertilizer. Before the extension of the green period to the base section of the 1st and 2nd section, it is necessary to strictly control and prevent the growth of the wheat seedlings. It is best to use a wooden rake to gently suppress one time before returning to the green, and control the delivery after the spring to promote the growth of the oysters. Accelerate the demise of small and medium-sized childbirth, so as to improve the population ventilation conditions, so that the base of the seedlings of the wheat seed stout and enhance resistance to lodging. The jointing fertilizer should be timely and appropriate, and should be supplemented with phosphorus and potassium fertilizer. The time cannot be earlier than the end of February. The quantity of 667 square meters of urea should not exceed 7.5 kg. For young rice plants that are prone to prosperous growth, they can be sprayed at the beginning of March with a booster to control them. 4, spray phosphorus strong particles. Foliar application of phosphate fertilizer, to increase the solid, increase grain weight, the effect is very obvious, in the booting period and before and after the heading, spraying 2-3 times potassium dihydrogen phosphate or superphosphate solution, each interval of 5-7 days, to improve Yield has a good effect.

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