According to the required number of panicles for the target yield, seedling quality, and seedling age, a reasonable basic seedling was determined. The principle is that the number of stems reaches the expected number of panicles at the critical leaf age. Under the premise of determining the number of panicles, the worse the quality of the seedlings and the greater the age, the more the basic seedlings should be. If the quality of the seedlings is worse, the more they should be planted earlier, the lower the quality of the seedlings. The greater the age, the lower the number of spikes in the main stem, but the number of tillers per panicle will increase.
At present, the basic seedlings in the japonica rice region of our province are between 30-40,000, and the basic seedlings of japonica rice are between 75-10 million, and in some places it reaches 300,000 seedlings. Using precision quantitative cultivation techniques for transplanting 5 leaves and 1 heart, the number of panicles of individual plants with 2 tillers indica hybrid rice combinations is 10-12, and indica rice is 8-10, so the basic seedlings of japonica rice varieties are 1.5-2.0 million/mu, and the basic seedlings of indica rice varieties range from 3.5 to 40000/mu. Accurate quantitative cultivation techniques can save nearly 50% of seeds.
2 Expanded line spacing
Expanding the row spacing can increase water temperature, promote rice tillering, increase tillering success rate, promote root growth, delay the senescence of middle and lower leaves and roots, increase the ability of photosynthetic production and accumulation from heading to maturity, and increase seed setting rate and grain weight. . Expanding the spacing can also reduce air humidity in the rice population, reduce the occurrence of pests and diseases, and is also the basis for heavy panicle fertilizer in later stages. The principle is that rice should be sealed in the period from booting to heading.
At present, the spacing of rice planted in Yunnan Province is 6 to 7 inches. After precise quantitative cultivation techniques, the row spacing of high-yielding fields in the japonica rice region is 8 inches, and the japonica rice region is 9-10 inches.
A seedbed or seedling bed is the local soil environment in which seeds are planted. Often it comprises not only the soil but also a specially prepared cold frame, hotbed or raised bed used to grow the seedlings in a controlled environment into larger young plants before transplanting them into a garden or field. A seedling bed is used to increase the number of seeds that germinate.
Greenhouse Seedling Bed,Stainless Greenhouse Seedling Bed,Greenhouse Seedling Nursery Bed
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