丹凤县川原小麦优化栽培技术方案探讨

1986～1988两年在凤丹县西河乡进行的多因素二次通用旋转回归设计小麦栽培结果分析表明:试验因素对小麦产量的效应顺序为:磷肥>播期>氮肥>播量。其中磷肥、氮肥效应方向为正,播期、播量效应方向为负;各因素的二次回归系数均显著,且方向皆为负;磷肥×播期、氮肥×磷肥互作均在不同程度显著。根据产量极值点对应的各因素取值和回归方程模拟结果,丹凤县川原灌区目前提高小麦生产水平的关键技术措施应在继续增加氮肥投入的同时重点增加磷肥投入,将小麦播期由10月下旬提早到10月中旬。作者还讨论了该地区小麦亩产250～350kg和400kg以上不同产量水平的优化栽培技术方案。

Discussion on the Optimum Cultivation Technical Scheme of Winter Wheat in Valley and Yuan Lands in Danfeng County

The experiments of wheat cultivation with the multiple factor quadratic general rotational regression design were carried out in Xihe Township of Danfeng County in the years of 1986- 1988.The results showed that the effect of sequence of the experimental factors upon wheat yield was P fertilizer >sowing periods > N fertilizer > sedding rate, and that the direction of effect of P fertilizer and N fertilizer is positive, while that of sowing periods and seeding rate is negative, and interaction of P fertilizer X sowing data, and N fertilizer X P fertilizer are significant to some extent. Based on the results of extreme value point of wheat yield corresponding to the values of each factor and regression equation model, the key technical measures for improving wheat production level in the valley and irrigated yuan lands in Danfeng county are to increase N fertilizer input in correspondance with priority given to P fertilizer input and to advance the sowing, date of winter wheat from the last decade to the middle decade of October. Also, this paper discusses the optimum cultivation technical scheme of various yield levels (250-350 kg/mu, and over 400 kg/mu) of winter wheat.