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采用多元二次回归,正交旋转组合设计方法,研究旱育抛秧,头季稻抛栽密度、氮肥基肥用量、促芽肥施用水平、留桩高度、发苗肥施用量对再生稻产量的影响。通过田间试验,经数学模拟选优,抛栽再生稻获得300kg/666.7m~2产量,需抛栽2.18万丛/666.7m~2,氮肥基肥施用量占76%(8.3kg/666.7m~2),催芽肥施用尿素19kg/666.7m~2,留桩高度45cm,发苗肥尿素施用量6.7kg/666.7m~2,为最佳组合。为制定再生稻旱育抛秧高产栽培措施提供依据。
Using multiple quadratic regression and orthogonal rotation combination design method, the effects of drought-tolerant and throwing-transplanting seedlings, planting density of first season rice, basal fertilizer application rate, application level of budding fertilizer, height of stubble pile, influences. Through field experiments, through mathematical simulation optimization, throwing planted ratooning rice to obtain 300kg / 666.7m ~ 2 output, throwing planted 21,800 strands / 666.7m ~ 2, nitrogenous fertilizer based on the amount of 76% (8.3kg / 666.7m ~ 2 ), Germination fertilizer application of urea 19kg / 666.7m ~ 2, leaving the pile height 45cm, the hair seedling fertilizer urea dosage 6.7kg / 666.7m ~ 2, the best combination. To provide the basis for developing high-yielding cultivation and cultivation methods of ratooning and transplanting rice.