育秧基质和喷水间隔处理对机插秧苗素质及产量的影响
收稿日期: 2020-07-21
修回日期: 2020-11-13
网络出版日期: 2021-01-10
基金资助
国家重点研发计划资助项目(2017YFD030070)
Effects of Seedling-raising Substrate and Water Spraying Interval on Seedling Quality and Grain Yield of MechanicallyTransplantedRice
Received date: 2020-07-21
Revised date: 2020-11-13
Online published: 2021-01-10
李睿, 董立强, 商文奇, 马亮, 王先俱, 王铮, 李跃东 . 育秧基质和喷水间隔处理对机插秧苗素质及产量的影响[J]. 中国水稻科学, 2021 , 35(1) : 59 -68 . DOI: 10.16819/j.1001-7216.2021.0714
【Objective】To explore suitable water management method formechanicallytransplantedrice seedlingsunder the mode of mechanized sowing and dry seedbed nursing.【Method】Two substrates(organic substrate andnutrient soil) were used and three water treatments(with water spraying intervalsof 24 h,48 h,72 h) were set at 1.5-leaf age to reveal the changes of the seedling quality, mechanical transplanting quality and rice yield, with Liaojing 401 as test material.【Result】Compared with the water treatments with a water spraying interval of 24 h, the 72 h-interval water spraying treatment could increase SPAD of seedlings, decrease the height of the seedlings, increase the number of the roots, the ratio of root to shoot, improve the quality of the seedlings. The injured seedling percentageand unplantedhillrate in the72 h-interval water spraying treatment was low and it took less time for seedlings to recover after transplanting, and the seedlings produced many new roots. The seedlings under the72 h-interval water treatment were more adaptable to the field environment, the chlorophyll fluorescence parameters of the seedlings in the72 h-interval water treatment were at a high level. The performance of productive panicle number, seed setting rate and actual yield of the 72 h-interval water treatment was the best.【Conclusion】The method of the 72 h-interval water treatment could improve the quality of the seedlings and machine-transplanted quality. The seedlings recover fast after mechanical transplanting, and the tillers transform into more productive panicles, thusthe actual yield of the 72 h-interval water treatment was increased.
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