Excellent varieties should have four conditions: first, high production volume, which is also the most important condition; second, good quality, which requires high rice yield, large meal yield, good local flavor and rich nutrition; The third is good adaptability and early improvement; the fourth is strong drought resistance and disease resistance. High-quality seeds should meet the following specifications: first, they should be pure and consistent, free from seeds of other types, other crops and weeds, and their soil, fine sand and other residues; second, the seeds should have a round and detailed appearance design; third, they should be perfect and free of pests; fourth, It has abundant vitality, strong germination rate and high survival rate.
Using superior varieties is the most economical, reasonable and high-yield strategy. Excellent rice varieties should have the following basic conditions: strong purpose, able to adapt to local climate, planting conditions and ripening planting requirements, and achieve multiple ripening. It has good harvest performance and mainly shows super high yield. Highly resistant to drought, disease and extreme weather. The quality is good, and the appearance quality and local taste quality of the rice are better than ordinary rice types. The varieties are selected according to the surrounding conditions. The altitude fortress, southern and northern climate conditions are different, and the number of days from planting to completion is mainly affected by environmental temperature conditions. Therefore, when choosing wheat varieties, the local caloric conditions must first be followed.
Under the conditions of ensuring normal ear emergence and firm flowering in the local area, wheat varieties with a longer growth period are used and local heat resources are flexibly used to achieve stable and high yields. Secondly, from the perspective of moisture requirements for rice, when choosing wheat varieties, it is also necessary to take into account the local rainfall characteristics to maximize strengths and avoid weaknesses. Use approved varieties to avoid blindly following the trend of cross-regional planting: varieties must be approved by the national or provincial variety approval federation before they can be promoted and planted on a large scale. Unapproved varieties cannot be publicized, sold or promoted.
If an unapproved species is used or is not within the scope of the approved area, it is likely that the characteristics will be unstable under certain conditions (such as sustained high temperatures). Of course, if there is a local breeding registration, it is possible. Planted. When choosing types of gate feng shui, the selected types should be consistent with local climate conditions, planting systems, and planting purposes. Each variety is different in terms of yield increase, maturity, drought resistance, local taste and quality. If you want to grow high-quality rice, you must first choose high-quality rice varieties, and then plant according to the characteristics of the varieties. The key point is to ensure safety and choose varieties that are perfect before frost according to the natural light and heat conditions of this period to avoid being exposed to "cold dew wind".