Root root system is the absorption organ of corn plant, with developed root system, deep soil, good anti-falling effect, good absorption function and long functional period, which is the basis for high yield.
Stems and stems, regardless of their thickness, require firmness and elasticity. Hardcore corn with good toughness and hardness, with strong resistance to lodging and high transport nutrient capacity. In addition, the short internodes are also good traits that are good for lodging resistance.
The plant height of the plant height is generally required to be about 2.5 meters. The ear position is low, generally less than 1.2 meters, the internode is short, the ear position is low, the plant center of gravity is low, and the lodging resistance is strong. The ears are neat and conducive to mechanized harvesting. The long internodes on the ear are good for daylighting and ventilation.
Generally speaking, the flat-type blade is long and wide, and the compact type is short and narrow, and the latter has more reasonable physiological indexes such as leaf orientation value, extinction coefficient, group photosynthetic potential and photosynthetic productivity. At present, the leaves are too wide, thick, and long varieties are gradually replaced by narrow, thin, and short varieties in the production practice. The frontal valgus of the blade is also a good shape, which can improve the photosynthetic efficiency per unit area. From the perspective of blade traits, it is advantageous for dense planting. The hardness of the blade should be moderate, and it is easy to take a ride and cause lodging.
The tassel tassels are not developed, but the varieties with sufficient pollen are easy to obtain high yield. The less developed tassel branches are less, which is conducive to saving plant nutrients, reducing shading and wind resistance, and facilitating the production of photosynthetic products on the leaves. However, in recent years, the pollination period of corn is affected by high temperature and heat damage, and the number of developed tassels can prolong the pollination period, which is conducive to the improvement of fruit fruit. It can be selected according to local conditions.
Ear 1. Size: In the Huang-Huai-Hai Plain area, the planting habits are changing from large panicle to medium-small spike varieties. The mid-small-small planting type has high yield and stable yield, and it is easy to obtain more high yield under high fertilizer and water conditions. For plots with poor water pouring conditions and poor land, the yield of the dense-tolerant varieties is higher than that of the rare-planted large-earth varieties. 2. Number of ear rows: the number of rows and rows of grains, and the reasonable combination of grain weights can achieve a reasonable single-grain weight. The number of ear rows in the Huang-Huai-Hai area is 14-16. Too many rows are difficult to obtain high yields, and more than 16 rows of spikes are prone to baldness, and most are not resistant to density. 3. Grain weight: Grain weight is a very important factor in the yield factor. The grain size is the same, the grainy layer is rich in grain weight and the yield is high. 4. Seed yield: When other traits are consistent, the seed yield is high and the variety yield potential is large.
Plant type corn plant types are divided into three types: flat type, compact type and semi-compact type. The ideal plant type is flat and flat. The leaves on the ear require an upright erection. The plant type after the tasseling requires that the leaves under the ear are flattened and open obliquely, and the whole plant type also becomes a "normal triangle".
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
The purpose of the sterilization box is to store the equipment in the process of packaging, sterilization, transfer, storage and so on. These orthopeadic instruments working mode is suitable for high pressure steam sterilization, not suitable for dry heat sterilization, ethylene oxide sterilization, ultraviolet sterilization, microwave sterilization and formaldehyde sterilization. The sterilization instrument box is divided into two parts,the cover and the body. The central area of the box cover is the filter system of the disinfection box, which is composed of quick filter system clasps and filter paper. The clasps need to be fixed by double keys, and the fixed sound can be heard during operation, which can effectively avoid the accidental loss of filter paper. Filter paper can be reused for 1 000 times, has chemical resistance, its chemical properties will not change with time, and its hardness exceeds steel. There is also a safety fit for the filtration system around the box cover, namely a silicone washer and a tension retaining ring. On both sides of the box there are handles, locks and sockets for indicating signs.
Sterilization Container,Sterile Containers,Medical Sterile Container,Sterile Basket
Jiangsu Aomed Ortho Medical Technology Co.,Ltd , https://www.aomedortho.com