CHHEDI LAL VERMA 1KRISHAN K.VERMA 2MUNNA SINGH3
作者信息
- 1. 区域研究站土壤盐度研究中心,印度勒克瑙 226005
- 2. 勒克瑙大学植物学系,印度勒克瑙 226007||广西农业科学院甘蔗研究所,广西 南宁 530007
- 3. 勒克瑙大学植物学系,印度勒克瑙 226007
- 折叠
摘要
Abstract
[Objective]Jatropha curcas is a potential source of biodiesel plant grown on waste and unattended lands,and parts of the areas are often suffered from flooding.The present study was conducted to develop a model to calculate the net CO2 assimilation rate,transpiration rate and sto-matal conductance with respect to leaf position,which affect the J.curcas productivity under soil flooding.[Method]The process of developing mathematical models for physiological responses as-sociated with parameterization,optimization and validation.The concept was applied for the calcu-lation of net CO2 assimilation rate from transpiration rate and stomatal conductance,transpiration rate from net CO2 assimilation rate and stomatal conductance,and stomatal conductance from net CO2 assimilation rate and transpiration rate in different leaf positions of J.curcas.The models were tested under soil flooding and normal conditions to suffice its wider applicability.A model was pro-posed to calculate net CO2 assimilation rate,transpiration rate and stomatal conductance responses from a known set of response function data by calculating a transformation characteristic constant between any two possible paired response functions.[Result]The mean deviations and root mean square errors(RMSE)of calculated physiological responses were low,which validated the pro-posed hypothesis and statistical models.The approach was applied for modeling physiological re-sponses successfully in J.curcas.RMSE ranged from1.69%to 11.17%when transpiration rate and stomatal conductance were transformed to net CO2 assimilation rate,and from 1.70%to 11.61%in case net CO2 assimilation rate and stomatal conductance were transformed to transpiration rate,and from 3.87%to 13.21%if net CO2 assimilation rate and transpiration rate were transformed to stoma-tal conductance,respectively.[Conclusion]The model can be useful for calculating cumulative re-sponses under different conditions from a basic known set of data.The key to successful physiologi-cal models is finding the better options that are realistic,easy to understand,interpretative and prac-tical between adherence to reality,comprehensibility,interpretative value,and practical usefulness on sustainable agriculture in years to come.关键词
麻风树(Jatropha curcas L.)/叶位/光合二氧化碳同化/蒸腾作用/气孔导度/土壤淹水Key words
Jatropha curcas L./leaf position/photosynthetic CO2 assimilation/transpiration/stomatal conductance/soil flooding分类
农业科学
