土地定量化模型在土地利用系统的应用

Application of land quantified model in land use system

摘要: 运用验证后的土地定量化模型(PS123)对曲周地区土地利用系统部分因素如冬小麦适播期、灌溉措施及光温生产潜力研究分析表明，该区冬小麦适播期为9月底～10月底，并宜选用早熟品种，总灌水量为180～240mm，平水年宜灌水3次左右，应重视冬小麦拔节后灌水，中后期灌水宜采用75～90 mm 较大定额。运用PS123模型计算该区冬小麦光温生产潜力为1．101万kg／hm²左右。

Abstract: After the earlbration，the land quantified model(PS123)is used to analyze several factors of land use system such as the seeding date，irrigation scenario and biophysical potential production．The optimum seeding date is from the end of September to October．The irrigation amount is 180～240 mm and it is appropriate to irrigate 75～90 mm each time at the last part of the growing season．The biophysica1 poten tial yidd of Quzhou region is about llOlOkg／hm²．