In late sowing wheat, due to less accumulated temperature before winter, the tillering period was significantly shortened, the tiller per plant was significantly reduced, and individuals were stunted. The amount of sowing should be appropriately increased, so that late sowing and dense panicle filling can be achieved to achieve ear yield. To sow for 2 days per night, increase the sowing rate by 0.5 kg. The wheat sown at the end of October should be about 15 kg per mu. In addition, the following measures should be taken to plant good late-season wheat: Due to the corresponding shortening of the growth period of late-seeding wheat, the late-maturing early maturing should be selected for the use of varieties, and the period of development should be fast, the time for nutrient growth is short, the grouting intensity is large, and the spring-like or weak-spring varieties with large grains and heavy spikes should be selected. Such as Yumai 34, Yumai 47, Zhengmai 9023, etc., to make up for the late sowing of wheat due to the lack of early temperature and the birth of the process is slow, can make full use of the late light and heat conditions, to achieve multiple grain weight, early maturing and high yield purposes . Add fertilization material to supplement fertilizer late. Late sowing wheat has the characteristics of late emergence, few tillers, small seedlings, poor root development, low number of panicles, low biological yield, rapid growth and development after spring, and short spike differentiation time, especially for the former. Late-seeding wheat fields have high soil fertility and poorly available nutrients. In addition, late-seeding wheat has weak seedlings before winter and early spring, and it is not easy to manage fertilizers and waters. Therefore, it is necessary to increase the amount of fertilizers, and to use basic fertilizers and organic fertilizers as the main factors. Nitrogen, phosphorus and potassium are used in combination, and phosphorus fertilizers should be added to promote the development of the main root system, increase dry matter accumulation and promote early maturing. Late-seeding wheat field can use 2 to 2.5 kg of urea per acre as a seed fertilizer, but pay attention to species and fertilizers to prevent burn wounds. Fine land preparation, to make up for the night. The late seeding wheat seedlings are weak and have poor root development. They have poor soil nutrient and water absorption capacity. Therefore, they should be evacuated early, settled early, sowed early, and properly sowed to reach the “deep, fine, fine, solid, flat†site preparation. Standards create good conditions for normal growth and development of late sowing wheat. Pregerminate shallow sowing, promote seedling early. Late sowing of wheat is suitable for soaking and germination. Seeds primed by soaking, under the same conditions, can be seeded 2 to 3 days earlier than dry seeding, and early 3 to 5 days. Immersion germination method is: 20 to 30 degrees warm water soaking for 5 to 6 hours, remove and dry after sowing. Appropriate shallow sowing of late-seeding wheat can reduce nutrient consumption. Generally, the depth of sowing should be 3 to 4 cm. Implement scientific management to promote seedlings and spikes. Late sowing of wheat due to weak seedlings, fertilizer and water consumption is less, generally not suitable for top-dressing water, so as not to reduce the temperature, affecting development. In order to compete for warming and strong seedlings, the wheat fields with poor quality of the land preparation, groundless waste, and poor lyrics can be repressed in winter and early spring, and then pressed in shallow depths. After the late sowing of wheat has risen, vegetative growth and reproductive growth go hand in hand. Plants grow fast and are sensitive to fertilizer and water requirements. During this period, fertilizer and water management must be strengthened to facilitate the development of tillers, produce more spikes, grow large spikes, and increase ear weight.
Our medicinal synthetic polyisoprene gasket for injection does not contain any substances that can easily produce pyrogen. We now use a unique technique to add cytotoxicity to the routine test of butyl rubber stoppers such as pyrogen, hemolysis, acute systemic toxicity test and so on. Systemic injection test and intradermal stimulation test have been used abroad for many years.Our good puncture resistance ensures the minimum rate of chip drop during the puncture process and our good self-sealing performance can guarantee no leakage during using process in hospital.Also,good retention of puncture device ensures that there is no needle slider and needle drop in the process of hospital use.
Isoprene Gasket,Medical Synthetic Isoprene Gasket,Pharmaceutical Polyisoprene Disc,Pharmaceutical Synthetic Disc
SUZHOU CRH PHARMACEUTICAL TECHNOLOGY CO.,LTD , https://www.crh-health.com