以不同株型棉花品种为研究对象,基于"同类相似性"原理,借助数学建模和统计分析方法,系统分析光温生态因子对棉花叶片长、宽,叶柄长、粗,主茎节间长、粗,果节长、粗,蕾铃高、直径等形态指标的影响,量化温、光因子与棉花各器官形态建成的关系,构建了基于GDD(growing degree day)和Logistic方程的棉花形态建成光温模型.利用独立的试验数据对模型进行了检验,结果表明,棉花主茎叶片的长度和宽度、叶柄长度、主茎节间的长度和粗度、果枝叶片的长度和宽度、叶柄长度、果节的长度和粗度、蕾铃高度和直径的RMSE值分别为0.48、0.65、0.53、0.09、0.02、0.55、0.28、0.23、0.14、0.17、0.20和0.11 cm.显示棉花器官形态指标的模拟值与检验值具有较好的吻合度,说明模型具有良好的预测性和描述性.%Due to their complexity in the morphological character of multi-branch cotton, it is hard to simulate the morphogenesis of cotton. The objective of the study was to construct a simulation model with morphological characters based on GDD (growing degree day) and Logistic equation. An experiment for model establishment was conducted using two cultivars (Meimian 33B and Jifeng 908) with three repetitions. The length and width of leaf, the length of petiole, the length and diameter of intemode, the height and diameter of boll were determined from three-leaf stage to the stationary length of leaf on main stem. The result was as follows: (1) GDD and IGDD were quantitied through integrating the quantitative connection of every organ of cotton and the rela-tionship of morphological indices to the effective cumulative temperature, the growing degree day and initial growing degree day of every organ in cotton were quantified. (2) The major influencing factors of temperature and sunlight were quantified. The tem-perature and sunshine hours effect factor model was constructed using mathematical modeling method, which can be explained and reflected better by effect factor in practice. (3) According to the pot experiment data in the field of Agricultural University of Hebei in 2006, through analyzing the effects of temperature and sunshine hours on morphogenesis formation in cotton, potential length and width of different cotton organs were quantitied. (4) By quantifying relationship of morphogenesis formation to tem-perature and sunshine hours, an ecological model of cotton morphogenesis was constructed with the rule of "the same similar". The model is based on GDD and Logistic equation, which can predict the morphologic indices such as the length and width of leaf, the length of petiole, the length and diameter of internode, the height and diameter of boll. The model was validated with inde-pendent dataset from experiment in Nanjing in 2006, the results showed that the RMSEs between simulated and observed value for length and width of leaf on main stem, length of petiole on main stem, length and width of internode on main stem, length and width of leaf on sympodial stem, length of petiole on sympodial stem, length and width of intemodes on sympodial stem, boll height and diameter was 0.48, 0.65, 0.53, 0.09 0.02, 0.55, 0.28, 0.23, 0.14, 0.17, 0.20, and 0.11 cm, respectively, which indicated that the present model has a good performance in predicting the dynamics of each organ size in cotton growth process.
展开▼
