河北省不同生态条件下冬小麦产量潜力及限制因素研究

在品种确定后，小麦产量将在一定程度上取决于环境条件。辩识小麦生产的光、热、土、水等生态条件及进一步明确影响产量的限制因素对制定相应的栽培技术有重要指导意义。本文应用ＦＡＯ推荐的方法估算了河北省小麦主产区昌黎、丰润、黄骅、固安、定州、藁城、阜城和临漳等八个代表性县市的小麦光热、光热水、光热土和光热水土产量潜力值，并依据自然降水和土壤养分资料估算了小麦生育期间逐月水分的产量限制系数及土壤中速效氮磷钾的产量限制系数。依此提出不同地区进一步挖掘小麦增产潜力的主攻方向。

Research on Yield Potentials and Limiting Factors of Winter Wheat under Different Ecological Conditions In Hebei Province

The variation of winter wheat yield depends,to some extent, on the ecological conditions under given cultivar.To analyse ecological conditions in wheat production,such as light,temperature,water and soil,is of great importance in increasing wheat grain yield and working out optimal cultivation techniques.In this paper, the values of photo-thermal, photo-thermo-water,photo-thermo-soil, photo- thermo- water-soil yield potentials of winter wheat in eight counties-- Changli, Fengrun, Huanghua,Gu'an Dingzhou,Fucheng and Linzhang,which represent the main production districts of Hebei Province.were estimated. usinq the method recommended by FAO Then , the limit coefficients to wheat grain yield of monthly rainfall and soil available N,P and K during P and K during growth of wheat were calculated on the basis of the data from these counties.According to these results,the main techniques for maximizing wheat grain yield in these districts were put forward.