安徽双季晚粳高产优质高效栽培模式研究

1990和1991年在芜湖和舒城两地选用秀水664进行双季晚粳秧龄、密度和每公顷施氮、磷、钾量五水平的二次正交旋转组合设计试验。试验数据的统计分析表明:该五因素对产量及构成因素之间的影响极显著。用回归方程模拟选优,每公顷产量达6750kg以上组合有836个,95%置信度的秧龄32.7～33.4天,48～49.5穴/m~2,每公顷施纯氮175.5～180kg,磷52.5～57kg,钾123～135kg。本文还制订了与回归数模相配套的栽培模式表。

Study on the Cultivation Model of High Yield,High Quality and High Benefits for Double-cropping Late Keng Rice in Anhui

The culitivation model of double-cropping late keng rice, Xiu shui 664, were studied bydesign of rotation regression orthogoned conbination, in Wuhu and Shuchen during 1990 and1991. The experiment consisted of 5 factors including seedling age, bunches/ha, the manuring ofnitrogen, pnosphorus and potassium and 5 levels of each factor. The date gained by a statisticalanalysis indicated that the effect of the test factors on the paddy yield per ha and its maincomponents was quite remarkable. The quadratic regression equation were respectively obtainedand the optimum results were chosen. There were 836 combinations of over 6750 kg/ha of thepaddy yield. The confidence limit at 95% level is about 32.7--33.4 days of the seeedling age,480--495 thousand bunches/ha and optimum using of nitrogen, phosphorns and potassium per hawas 175.5--180,52.5--57 and 123--135 kg,respectively. The cultivation model table that coordinated with the regression mathematical model wasworked out. The "four less and four higher" is the technical route. Seeds were sown for 300--375kg/ha in rice seed--bed. They were transplanted for 3--4 seedling per bunch and were notfertilized for attacking tiller combined with shallow water--moist--sun filed in the rice field.According to the appropriate effective panicles/m~2 rate of tiller panicles, rate of stem and tillerpanicles, rate of fruit, grain weight/panicles were increased. The high yield, high quality and highbenefits were obtained.