水分胁迫条件下春玉米根系吸水模型参数的推求
|
摘要
为了探究作物根系吸水与根区土壤水分运动的关系,在甘肃省石羊河流域开展春玉米田间试验,引入Feddes提出的根系吸水模型,在春玉米生育期内选择7个时间段作为研究春玉米根系吸水时间段,设置充分灌溉与非充分灌溉处理,利用水量平衡方程分别计算2个处理在各个时段的根系吸水量。在此基础上,利用最小二乘法优化得到水分胁迫系数的参数p1为1.384,并且对非充分灌溉处理的根系吸水量模拟值和实测值进行了比较,相关系数为0.981,模拟值和实测值的误差在允许的误差20%范围之内。建立了水分胁迫条件下春玉米的根系吸水模型,为该地区研究春玉米种植条件下土壤水分运动规律奠定基础。
In order to study the relations between the root-water-uptake of crop and soil water transport in root zones,field experiments are conducted under the conditions of spring maize growth in Shiyang Rive Basin of Gansu province. It is introduced into the root-water-uptake model,which is proposed by Feddes. During the growing period of spring maize,the seven time periods are selected to study the root-water-uptake of spring maize. Sufficient irrigation and deficient irrigation treatment are set up in field experiments. The root-water-uptake content of two treatments at different period is calculated using water balance equation. The parameter(p1) of soil water stress reduction function is optimized by the least square method and the parameter(p1) is 1. 384. The root-water-uptake content of deficient irrigation treatment is simulated and compared with measured value. The correlation coefficient is 0. 981 and the error between the simulated and measured values is within the allowable error range of 20%. It establishes the root-water-uptake model of spring maize under soil water stress conditions. This model is conducive to understanding of the law of soil water movement under springmaize growth.
In order to study the relations between the root-water-uptake of crop and soil water transport in root zones,field experiments are conducted under the conditions of spring maize growth in Shiyang Rive Basin of Gansu province. It is introduced into the root-water-uptake model,which is proposed by Feddes. During the growing period of spring maize,the seven time periods are selected to study the root-water-uptake of spring maize. Sufficient irrigation and deficient irrigation treatment are set up in field experiments. The root-water-uptake content of two treatments at different period is calculated using water balance equation. The parameter(p1) of soil water stress reduction function is optimized by the least square method and the parameter(p1) is 1. 384. The root-water-uptake content of deficient irrigation treatment is simulated and compared with measured value. The correlation coefficient is 0. 981 and the error between the simulated and measured values is within the allowable error range of 20%. It establishes the root-water-uptake model of spring maize under soil water stress conditions. This model is conducive to understanding of the law of soil water movement under springmaize growth.
引文
[1]王瑗,盛连喜,李科,等.中国水资源现状分析与可持续发展对策研究[J].水资源与水工程学报,2008,19(3):10-14.
[2]杨永辉,胡玉昆,张喜英.农业节水研究进展及未来发展战略[J].中国科学院院刊,2012,8(4):455-461.
[3]王玉阳,陈亚鹏.植物根系吸水模型研究进展[J].草业学报,2017,26(3):214-225.
[4]高晓瑜,霍再琳,冯绍元.水盐胁迫条件下作物根系吸水模型研究进展及展望[J].中国农村水利水电,2013(1):45-48.
[5]Albasha R,Mailhol J C,Cheviron B.Compensatory uptake functions in empirical macroscopic root water uptake models experimental and numerical analysis[J].Agricultural Water Management,2015,155:22-39.
[6]Hopmans J W,Bristow K L.Current capabilities and future needs of root water and nutrient uptake modeling[J].Advance in Agronomy,2002,77:103-183.
[7]Sepaskhah A R,Yarami N.Evaluation of macroscopic water extraction model for salinity and water stress in saffron yield production[J].International Journal of Production,2010,4(3):175-186.
[8]蒋静,冯绍元,霍再林,等.盐化土壤节水灌溉春玉米产量及耗水规律研究[J].中国农村水利水电,2015(5):19-22.
[9]Feddes R A,Kowalik P J,Zarandy H.Simulation of field water use and crop yield[M].Wageningen:Pudoc for centre for agricultural publishing and documentation,1978.
[10]Jiang J,Feng S Y,Ma J J,et al.Irrigation management for spring mazie grown on saline soil based on SWAP model[J].Field Crop Research,2016,196:85-97.
[2]杨永辉,胡玉昆,张喜英.农业节水研究进展及未来发展战略[J].中国科学院院刊,2012,8(4):455-461.
[3]王玉阳,陈亚鹏.植物根系吸水模型研究进展[J].草业学报,2017,26(3):214-225.
[4]高晓瑜,霍再琳,冯绍元.水盐胁迫条件下作物根系吸水模型研究进展及展望[J].中国农村水利水电,2013(1):45-48.
[5]Albasha R,Mailhol J C,Cheviron B.Compensatory uptake functions in empirical macroscopic root water uptake models experimental and numerical analysis[J].Agricultural Water Management,2015,155:22-39.
[6]Hopmans J W,Bristow K L.Current capabilities and future needs of root water and nutrient uptake modeling[J].Advance in Agronomy,2002,77:103-183.
[7]Sepaskhah A R,Yarami N.Evaluation of macroscopic water extraction model for salinity and water stress in saffron yield production[J].International Journal of Production,2010,4(3):175-186.
[8]蒋静,冯绍元,霍再林,等.盐化土壤节水灌溉春玉米产量及耗水规律研究[J].中国农村水利水电,2015(5):19-22.
[9]Feddes R A,Kowalik P J,Zarandy H.Simulation of field water use and crop yield[M].Wageningen:Pudoc for centre for agricultural publishing and documentation,1978.
[10]Jiang J,Feng S Y,Ma J J,et al.Irrigation management for spring mazie grown on saline soil based on SWAP model[J].Field Crop Research,2016,196:85-97.