What is an improved variety of rice? How to select improved varieties according to local conditions?
Improved rice varieties have relatively stable specific heredity and relative consistency in biology, economy and morphology. In specific areas, specific cultivation conditions and periods, it meets the needs of production in terms of yield, maturity, quality and adaptability. In addition to having the basic conditions of varieties, improved rice varieties must also have the advantages of high yield, stable yield, good rice quality, disease resistance, insect resistance, strong stress resistance and so on.
A good rice seed should include three aspects: first, it should have the characteristics of high yield, high quality and multi-resistance; the processed milled rice has higher rate of head rice, better appearance merchandise, better palatability after cooking, and rice is soft but not glued, that is, delicious, good price, easy to sell. Second, no matter the selected or introduced varieties, after the variety examination and approval, the seed supply units need to maintain the excellent species character and breed the production species with high purity and strong germination potential; third, it is necessary to adapt to the requirements of ecological and production level and planting system reform in different agricultural regions, that is, to adapt to seasons, stubble and other production conditions. Of course, as an improved variety also has shortcomings, but in the main economic traits and adaptability should be good, no serious defects, or weaknesses can be overcome through cultivation measures. However, the selection of high-quality rice varieties should be based on local conditions. In rice fields with low soil fertility, heavy soil quality and slow development in early stage, high quality varieties with strong tillering ability, fertilizer tolerance and lodging resistance should be selected, while high quality rice varieties with medium or strong tillering ability should be selected in rice fields with high soil fertility, soft soil and early growth. In addition, the selection of high-quality rice varieties should consider whether it can meet the arrangement of early and late cropping stubble, and the selection of late-growing high-quality rice varieties should be based on the principle that local safe full heading can be achieved.
- Prev
The latest Rice breeding techniques in the World
The purpose of the study on salt-tolerant rice breeding is: 1. To make the new salt-tolerant rice adapt to the cultivation of saline-alkali soil. 2. In the case of shortage of fresh water, seawater can be fully utilized for irrigation. Salt-tolerant crops such as tomato, melon and barley have been reported abroad. Salt-tolerant rice cultivated by the University of Sussex in the UK can grow vigorously in the field, but we must see the complexity of regulating salt content in the field. Genetic engineering of salt-tolerant rice is very active in the UK. Researchers use genes of salt-tolerant rice to be implanted into rice.
- Next
Apply the "three fertilizers" of rice well
Seedlings flourish, invalid tillers grow rapidly, resulting in greedy green late maturity; some seedlings grow shade, leading to diseases such as sheath blight or rice blast. If fertilizer damage occurs in rice fields, the yield will be reduced in light cases, and the seedlings will be ploughed and replanted in heavy cases. In order to give full play to the fertilization effect of rice, in addition to applying sufficient base fertilizer, we must apply "three fertilizers" in topdressing, that is, tillering fertilizer, panicle fertilizer and grain fertilizer. Rice fertilization should be considered comprehensively according to variety characteristics, soil fertility, climatic factors and cultivation conditions, and applied flexibly. The demand for fertilizer for rice is shown in the camp.
Related
- The first cup of black tea in spring, the flavor and history of tea gardens in Kenya, Africa
- The computer can not only choose potatoes, but also grow tea rice. AI will grow winter oolong tea champion.
- It is not only the inflated tea bitten by insects, but also engraved with the four seasons tea in Beipu.
- The Oriental Beauty Tea Festival in Zhuxian County takes the stage at the weekend to experience the plus-size feast of oil tea.
- & quot; Oriental Beauty Tea & Exploration of Emei in Hsinchu, the hometown of quot;
- The new variety of strawberry "Tainong 1" dessert is the first choice with mellow aroma. Crimson gorgeous
- History of Tea in Taiwan: from Wild Inner Mountain to Export Tea Garden
- Two types of Taiwan Oriental Beauty Black Tea won the British three-Star Award for Childhood Tea Xiang Zhang Jiaqi changed from pilot to champion tea maker.
- Banana species and varieties: the planting history of Taiwan Xianren banana and dwarf banana is long, is banana disease resistant?
- Coffee planting Technology: Qianjie Coffee from Seedling to harvesting