The models were validated with adopting local weather ( average temperature per month , average maximum temperature per month ; average minimum temperature per month ; sunlight times per month , and latitude ) , varieties , and experiment data from different yielding levels in nanjing and jinan areas , the correlation coefficient , standard error of absolute deviation , and average absolute deviation between the observed and the stimulated were 0 . 9761 and 0 . 9620 with 0 . 01 significant level , 0 . 5891 and 0 . 7094 , and 0 . 12 and 0 . 43 , respectively 所建模型可以利用当地常年气象资料（ 30年平均值，如月平均气温、月平均最高和最低气温以及月日照时数、纬度） ，确定不同地区、产量水平与品种最适叶面积指数动态，为小麦数字化栽培提供科学依据。
The result of experimentation on coupling effect of water and fertilizers on spring corn in the three gorges reservoir area indicate that water stresslead the effect low of highness and lai , and the most effect is made in shooting stage ; it has a significant positive correlation between the yield of corn and biomass , and hasn ' t none significant positive correlation between the yield of corn and the weight of roots ; the coupling effect of water and n is significant , but the coupling effect of water and k is not significant , the maximum yield of corn condition fitting - water and medium n , corn absorbs n has a threshold value during the growth , and using superfluous n is able to prick up soil drought and crop drought ; water is the leading factor which effects the yield of corn , next is n and k 摘要三峡库区春玉米盆栽水肥耦合试验研究结果表明，水分胁迫导致玉米株高和叶面积指数降低，以拔节期受到影响最大；玉米产量与生物量呈显著正相关关系，产量与根重无显著正相关关系；水氮耦合效应显著，适宜水分和中氮处理下玉米的产量最高，玉米生长发育对氮肥的吸收存在一定的阈值，过多施用氮肥会加剧土壤干旱和作物干旱，水和钾耦合效应对玉米产量影响不显著；水分是影响玉米产量的主导因素，其次是氮效应和钾效应。
The knowledge model for the dynamics of main development indices as plant height , leaf area index , dry matter accumulation , numbers of fruit branch , square and boll was developed based on the physiological time and target yield and quality . in addition , the dynamic relationships between plant nutrients and dry matter accumulation was quantified . all these sub - models provide the reference standards for quantitative and dynamic growth diagnosis and management regulation 进一步根据产量和品质目标构建了株高、叶面积指数、干物质积累量、果枝和蕾铃数目变化与生理时间之间的动态关系知识模型，初步量化了棉株养分积累量与干物质积累量之间的动态关系，从而为定量化的苗情诊断和管理调控提供了参考标准。
