北方水稻动态水分生产函数研究

研究采用蒸渗仪和盆栽相结合的方法，在分析水稻干物质生长规律的基础上，提出了干物质随时间累计的数学模型和干物质累计量与籽粒产量之间关系的数学模型，在此基础上，参考前人旱作物动态产量模型，构造了水分亏缺影响函数，对分阶段线性函数、指数乘子式函数和三次式函数进行参数拟合，提出了水稻动态产量数学模型，求出了沈阳地区水稻水分生产函数动态产量模型参数，并利用1999年实测资料对模型进行了检验和灵敏度分析。

Dynamic water production functions for rice in North China

Alternative forms of a dynamic production function were compared, which described dry matter accumulation and seed production for rice, based on data from lysimeters and ceramic pots. Response functions were obtained for the whole growing season and for three separate growth stages covering transplanting to tillering, jointing, boot stage to heading, florescence and milk stage to harvest, respectively coefficients were determined for linear subsection functions of an incremental dry matter production function, based on the Morgan model. Exponential and third order polynomial functions were also fitted to the incremental growth rate functions. A dynamic rice production model was developed with coefficients being determined from data collected in Shenyang in 1998. The model was tested with data collected in 1999 and model sensitivity was examined. Results show that the model is well adapted to local conditions.