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机构地区:[1]四川农业大学,四川雅安625014 [2]四川省农业科学院,四川成都610066
出 处:《西南农业学报》2006年第5期823-828,共6页Southwest China Journal of Agricultural Sciences
基 金:四川省科技厅应用基础研究项目;四川省教育厅重点研究项目
摘 要:本文采用二次回归正交旋转组合设计,考察施N量,追N时期,施K量、密度和播期五个因素,对两系杂交水稻两优681进行了以提高结实率为目标的栽培模式的研究,建立了该类品种的农艺措施数学模型。同时,采用了统计选优方法、降维分析法、边际效应分析法和贡献率法对回归方程进行了优化分析。结果表明:各因素对结实率影响的重要性依次为:播种期〉追N时期〉密度〉施K量〉施N量;结实率达到85%以上的配套栽培模式要点为:施N量(纯N)130.7~137.6kg,/hm^2,追N时期为7月8日至9日(减数分裂期),施K量(K20)218.9~222.1ke,/hm^2,栽插密度为23.4—24.22万穴/hm^2,播种期为3月30日至4月1日。A field study on increasing two-line hybrid Liangyou-681' s grain beating rate was carried out using secondary regression orthogonal rotary combination and observing five factors:the amount of N and K,the dressing period of N,density and sowing time was used to create a mathematical model of agronomic traits. The results were as follows: ( Ⅰ ) The order of importance of each factor on bearing rate was: sowing time, the dressing period of N, planting density, the amount of K, and the amount of N; (Ⅱ )The optimal conditions for increasing grain beating rate were as follows:purified nitrogen was 130.7 - 137.6 kg/hm^2 ; dressing time of N was July 8 - 9(meiosis) ; K20 was 218.9 - 222.1 kg/hm^2 ; the planting density was 234 000 - 242 000 plants/hm^2 and the range of sowing date was from March 30 to April 1.
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