超级杂交稻模式株型的光合优势

以三系杂交稻汕优63为对照，比较研究表明，具有超级杂交稻模式株型的培矮64S/E32有以下生理优势。（1）叶面积指数前期较小，中期稳健，后期衰减缓慢、维持较高水平；（2）抽穗后剑叶和倒2叶的比叶重显著或极显著大于对照；（3）后期上3叶叶绿素含量衰减缓慢，变化平稳；（4）上3叶单位叶面积气孔数目比对照多19.2%，达极显     

太行山前平原土壤水分特征曲线拟合参数的确定

本文分别用BrooksandCorey ,vanGenuchten和Broadbridge White模型拟合了太行山山前平原不同层次土壤水分特征曲线 (SWC) ,并用Mualem和Burdine模型计算了土壤非饱和导水率(K)和扩散率 (D)。最能较好计算实验地点D和K的方法是用vanGenuchten模型拟和SWC(约束条件m =1- 2 /n) ,用Burdine方法计算K和D。     

: a software to evaluate model performance

The software (Integrated Resources for Evaluating Numerical Estimates) is a data analysis tool designed to provide easy access to statistical techniques for use in model evaluation. Mostly, non-replicated model estimates (E_i) are compared against non-replicated measurements (M_i). The software also allows comparing individual estimates against replicated measurements (or vice versa) and replicated estimates against replicated measurements. The evaluation of model performance is essentially based on the difference E_i−M_i, or on the correlation–regression of E_i vs. M_i (or vice versa). In addition, model evaluation by probability distributions, pattern analysis, or fuzzy-based aggregation statistics is allowed. Graphics are included in most analytical tasks. The results are displayed in separate spreadsheets and can be exported into MS Excel workbooks.     

Development of a crop knowledge base for Europe

This paper describes the development of a Crop Knowledge Base System for use in crop modelling and yield forecasting. The inherent limitations of databases can cause problems for dealing effectively with geo-referenced data sets. The system described here includes all the normal database operations but also handles richer types of data. Values of queried attributes can be deduced through the use of heritability within hierarchies and by the application of rules that summarise sets of empirical observations. The system is able to reason about similar locations, so that where no information exists in the knowledge base for a particular location, then an alternative location, subject to similar meteorological and agricultural conditions, will be sought.     

田间试验的空间变异性及其统计控制

利用空间相关模型和传统方差分析模型对小麦和玉米3个田间试验产量数据进行了拟合与分析。结果表明，3个试验都显著存在空间变异，空间变异方差占据剩余变异方差的83.5%~0.4%；相对于传统随机完全区组分析法，空间相关模型法效应比较的标准误平均降低18.4%~14.2%，分析相对效率平均为1.50~1.36，因而比区组控制空间变异更有效；不同空间相关模型分析的结果呈现出一定的差异。建议利用空间相关模型分析田间试验，并利用Akaike信息准则（AIC）进行最佳空间相关模型选择。     

三峡库区农业资源持续高效利用模式研究

针对三峡库区资源环境和农业生产现状及存在问题,探讨了农业资源持续高效利用的主要生产模式,即:种—养—加—销一体化模式、农林牧复合模式、农林复合模式、种—养立体农业模式和庭院高效生态农业模式等,并结合典型案例进行分析。此外,提出了实现农业资源持续高效利用的建议和对策。     

Development Capacity of the Old -town Renewal Determined by GIS --A Case Study of Old -town Renewal in Nanyang City

Along with the process of urbanization,the old-town renewal has become the top task in the city construction.Directed by quantitative analysis of city's economy,this paper puts forward a new conception and model of development capacity for old city renewal,established land class evaluation system and AHP model to determine the land class and its evaluation factors.Restricted by the old town's eco-environment and social environment,and targeted by its economy,this paper suggests that the upper limit model of the old city's development capacity should be decided by its eco-environment volume and social environment,and the lower limit model should be determined by the market economy,thus the renewal can see the economy,society and environment proceed orderly and harmoniously.Upon the platform of ARCGIS with considering Nanyang old town renewal planning and design,this paper has drawn a digital map for old town renewal development intensity,and explores tentatively the proper development capacity under the platform of GIS.     

基于WIN ISAREG模型的青贮玉米灌溉制度优化研究

为了探索锡林河流域青贮玉米高效节水的最优灌溉制度,进行了连续2年的田间灌溉试验,研究了滴灌条件下青贮玉米的灌溉制度。研究表明,青贮玉米在拔节期-抽雄期土壤水消耗比率最低,作物系数、产量反应系数和腾发量在整个生育期内均达到最大,为青贮玉米的需水关键期;在田间试验的基础上,利用WIN ISAREG模型对实际灌溉制度进行了评价,并模拟了多种组合方案,得到了青贮玉米优选的灌溉制度,青贮玉米生育期内共灌水8次,灌水量200 mm,产量下降率为5.6%,灌水效率达到100%。研究结果可为流域内的青贮玉米灌溉预报,以及有效的利用当地水资源提供参考。     

农村住宅采暖技术试验研究

本文叙述了以太阳能采暖房为主体,利用连炕节柴灶余热作热源、吊炕为散热器的农村住宅采暖技术,它比仅靠太阳能采暖,室温提高3.49℃,12℃的采暖保证率达到90.33％。文中同时给出了该种采暖型式的热工参数设计模型和建筑结构模型。可供其它多种太阳能一常规能源综合采暖参考。     

相依自然降水序列干湿游程特征量的模拟分析

以游程理论中ＳｅｎＺ．的方法为基础，研究了相依自然降水序列的主要干湿游程特征量──有限样本长度，给定截取水平的交互点数，干湿游程长的期望值，正、负游程和的期望值等的理论模拟模式。并以郑州１０年逐旬降水序列对模拟结果进行了验证，理论与实际结果具有较好的一致性。