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通过设置带土直立苗、带土倾斜苗、带土平躺苗、无土平躺苗、无土直立苗等不同苗姿,研究了抛秧稻的根系生长特点及其对水稻生长的影响。带土直立苗、带土倾斜苗抛秧活棵立苗快,在根系长度、根系干质量、黄根比方面都优于带土平躺苗和无土平躺苗,后者的立苗速度和根系生长极显著线性相关。秧苗活棵立苗后,带土直立苗、带土倾斜苗分蘖发生迅速且成穗率高,后期有着较强的根系活性,各生育时期保持适宜的根冠比,植株的吸氮速率、叶片的叶绿素含量、根系下扎深度都显著高于带土平躺苗和无土平躺苗。带土直立苗、带土倾斜苗活棵立苗快,其根系生长显著优于带土平躺苗和无土平躺苗,并在各生育时期保持较强的生长势。因此,提高带土直立苗比率、减少平躺苗比率和通过促进根系生长来促进抛秧立苗,进而促进抛秧稻高产、超高产。
The characteristics of root growth of throwing rice seedlings and their effects on the growth of rice were studied by setting different seedling appearances such as vertical soil seedlings with soil, soil sloping seedling, soil lying flat seedlings, soilless planted seedlings and soilless upright seedlings. With soil erect seedlings, soil tilting seedling throwing seedlings live legislation fast, in the root length, root dry weight, yellow root ratio are better than with soil lying seedlings and soilless lying seedlings, the latter seedling speed Significant linear correlation with root growth. After standing seedling seedlings, with soil standing seedlings, tillering seedlings with soil quickly tilted and spike rate, the latter has a strong root activity, maintaining appropriate root and shoot ratio during each growth period, plant nitrogen uptake rate, leaves Of the chlorophyll content, the depth of root tie under the tie were significantly higher than the soil with flat-lying seedlings and soilless flat lay seedlings. With soil erect seedlings, with soil tilting seedling live Miao fast, its root growth was significantly better than the soil with flat-lying seedlings and soilless flat seedlings, and in each growth period to maintain a strong growth potential. Therefore, increasing the ratio of soil stand upright seedlings to reduce the proportion of lying seedlings and promote root growth by throwing seedling stand, thereby promoting throwing rice high yield and super high yield.