摘要
根据玉米分期播种资料，得出不同品种播种到出苗，出苗到抽雄及抽雄到成熟的热量指标，以地区热量资源的满足程度确定其成熟度及成熟概率。根据不同品种的成熟概率及收益状况，利用概率决策方法确定地区的主栽品种以及利用线性规划的方法求解不同品种最佳搭配的比例，从而为充分合理利用热量资源，获得最佳的经济效益提供气候依据。
Based on data of maize sown at different periods of time,this study obtains heat indexes of different varieties of maize for the periods between seeding and sprouting,between sprouting and heading and between heading and meturing.Degree of maturing and probability of maturation can be determined by satisfaction of regional source of heat.According to per hectare yield of different varieties of maize and different year's probability of maturation of each variety of maize,gains or gains and losses can be determined.Probability decision making method can be adopted to identify leading variety of maize to be planted in the study area and linear programming method can be used to determine objective function that can obtain optimal per hectare maize yield.Limiting condition is that utilization ratio of agro climatic resources in the concerned area may be the highest at low temperature year,high temperature year or average temperature year.So the optimal arrangement ratio among varieties of maize can be calculated for different localities.Therefore,the climatic evidences can be provided for rational utilizing heat resources and gaining optimal economic benefits.The study also points out that ratio of late variety will be decreasing and that of early maturing variety will be increasing from south to north in a leading variety growing area.
出处
《资源科学》
CSSCI
CSCD
北大核心
2000年第1期60-64,共5页
Resources Science
基金
国家气象局重点科技攻关项目
