基于加速遗传算法的免耕农田土壤水分特征曲线分析
|
摘要
为获得淮北平原耕作模式变化后砂姜黑土的最新土壤物理性状,为合理设计农田灌排工程和灌溉制度提供重要的理论依据,利用激光粒度仪和压力膜仪测定了6组不同深度的土壤机械组成和土壤水分特征曲线,分析了土壤水分特征曲线和干容重在垂向上的变化规律和分层土壤质地分类,同时利用实测值通过加速遗传算法对VG模型参数进行优化。结果表明,土壤水分特征曲线、干容重及机械组成等物理性状的垂向分布存在差异,0～30 cm土层土壤的持水性在低吸力(0～631.13 cm)范围内基本相同,吸力增大后出现差异,30～40 cm土层的土壤物理性状均与上下土层有明显差异,存在明显分界,因此确定作物适宜土壤含水率下限时宜分层考虑;利用加速遗传算法优化率定VG模型后的拟合结果误差小精度高,拟合效果好,用优化后模型参数的物理含义来描述砂姜黑土实际的土壤水分特征曲线的特征是可行可靠的。
In order to obtain the latest soil physical properties of lime concretion black soil after the change of farming pattern in Huaibei Plain and provides an important theoretical basis for rational design of irrigation and drainage system and irrigation system, a laser particle size analyzer and a pressure membrane meter were used to determine the soil mechanical composition and soil moisture characteristic curve at six different depths. The composition and soil water characteristic curves were used to analyze the variation of soil water characteristic curve and dry bulk density in the vertical direction and the classification of layered soil texture. At the same time, the parameters of Van Genuchten model were optimized by accelerated genetic algorithm through using measured values. The results show that there are differences in the vertical distribution of physical characteristics such as soil water characteristic curve, dry bulk density and mechanical composition. The water holding capacity of soil in 0～30 cm soil layer is basically the same in the range of low suction force(0～631.13 cm) while the suction increases. The difference is that the soil physical properties of the 30～40 cm soil layer are obviously different from the upper and lower soil layers, and there is a clear boundary. Therefore, it is necessary to consider the stratification when determining the minimum soil moisture content of the crop. The result of using the accelerated genetic algorithm to optimize the Van Genuchten model is that the error is small, the precision is high, and the fitting effect is good. It is feasible and reliable to describe the characteristics of the actual soil moisture characteristic curve of lime concretion black soil with the physical meaning of the optimized model parameters.
In order to obtain the latest soil physical properties of lime concretion black soil after the change of farming pattern in Huaibei Plain and provides an important theoretical basis for rational design of irrigation and drainage system and irrigation system, a laser particle size analyzer and a pressure membrane meter were used to determine the soil mechanical composition and soil moisture characteristic curve at six different depths. The composition and soil water characteristic curves were used to analyze the variation of soil water characteristic curve and dry bulk density in the vertical direction and the classification of layered soil texture. At the same time, the parameters of Van Genuchten model were optimized by accelerated genetic algorithm through using measured values. The results show that there are differences in the vertical distribution of physical characteristics such as soil water characteristic curve, dry bulk density and mechanical composition. The water holding capacity of soil in 0～30 cm soil layer is basically the same in the range of low suction force(0～631.13 cm) while the suction increases. The difference is that the soil physical properties of the 30～40 cm soil layer are obviously different from the upper and lower soil layers, and there is a clear boundary. Therefore, it is necessary to consider the stratification when determining the minimum soil moisture content of the crop. The result of using the accelerated genetic algorithm to optimize the Van Genuchten model is that the error is small, the precision is high, and the fitting effect is good. It is feasible and reliable to describe the characteristics of the actual soil moisture characteristic curve of lime concretion black soil with the physical meaning of the optimized model parameters.
引文
[1] 谢迎新,靳海洋,孟庆阳,等.深耕改善砂姜黑土理化性状提高小麦产量[J].农业工程学报,2015,31(10):167-173.
[2] 刘艳丽,李成亮,高明秀,等不同土地利用方式对黄河三角洲土壤物理特性的影响[J].生态学报,2015,35(15):5 183-5 190.
[3] 柴仲平,梁智,王雪梅等. 不同灌溉方式对棉田土壤物理性质的影响[J]. 新疆农业大学学报, 2008, 31(5):57-59.
[4] 付强,蒋睿奇,王子龙,等.基于改进萤火虫算法的土壤水分特征曲线参数优化[J]. 农业工程学报,2015,31(11):117-122.
[5] 马亮.基于改进粒子群的土壤水分特征曲线参数优化研究[J].节水灌溉,2014,(11):17-20.
[6] 郝振纯,杨兆,王加虎,等. 淮北平原典型土壤水分特征曲线测定与分析[J].水电能源科学,2013,31(2):106-108.
[7] 邢旭光,赵文刚,马孝义,等.土壤水分特征曲线测定过程中土壤收缩特性研究[J].水利学报,2015,46(10):1 181-1 188.
[8] 宋孝玉,李亚娟,李怀有,等.土壤水分特征曲线单一参数模型的建立及应用[J].农业工程学报,2008,24(12):12- 15.
[9] 王小华,贾克力,刘景辉,等.Van Genuchten模型在土壤水分特征曲线拟合分析中的应用[J].干旱地区农业研究,2009,27(2):179-183,188.
[10] 魏翠兰,高伟达,李录久,等.不同初始条件对砂姜黑土收缩特征的影响[J].农业机械学报,2017,48(10):229-236,271.
[11] 王德,傅伯杰,陈利顶,等.不同土地利用类型下土壤粒径分形分析——以黄土丘陵沟壑区为例[J].生态学报,2007,(7):3 081-3 089.
[12] 丁敏,庞奖励,刘云霞,等.黄土高原不同土地利用方式下土壤颗粒体积分形特征[J].干旱区资源与环境,2010,24(11):161-165.
[13] 金菊良, 杨晓华, 丁晶. 标准遗传算法的改进方案——加速遗传算法[J]. 系统工程理论与实践, 2001,21(4):8-13.
[14] 郑子成,李卫,李廷轩,等.基于分形理论的设施土壤水分特征曲线研究[J].农业机械学报,2012,43(5):49-54.
[2] 刘艳丽,李成亮,高明秀,等不同土地利用方式对黄河三角洲土壤物理特性的影响[J].生态学报,2015,35(15):5 183-5 190.
[3] 柴仲平,梁智,王雪梅等. 不同灌溉方式对棉田土壤物理性质的影响[J]. 新疆农业大学学报, 2008, 31(5):57-59.
[4] 付强,蒋睿奇,王子龙,等.基于改进萤火虫算法的土壤水分特征曲线参数优化[J]. 农业工程学报,2015,31(11):117-122.
[5] 马亮.基于改进粒子群的土壤水分特征曲线参数优化研究[J].节水灌溉,2014,(11):17-20.
[6] 郝振纯,杨兆,王加虎,等. 淮北平原典型土壤水分特征曲线测定与分析[J].水电能源科学,2013,31(2):106-108.
[7] 邢旭光,赵文刚,马孝义,等.土壤水分特征曲线测定过程中土壤收缩特性研究[J].水利学报,2015,46(10):1 181-1 188.
[8] 宋孝玉,李亚娟,李怀有,等.土壤水分特征曲线单一参数模型的建立及应用[J].农业工程学报,2008,24(12):12- 15.
[9] 王小华,贾克力,刘景辉,等.Van Genuchten模型在土壤水分特征曲线拟合分析中的应用[J].干旱地区农业研究,2009,27(2):179-183,188.
[10] 魏翠兰,高伟达,李录久,等.不同初始条件对砂姜黑土收缩特征的影响[J].农业机械学报,2017,48(10):229-236,271.
[11] 王德,傅伯杰,陈利顶,等.不同土地利用类型下土壤粒径分形分析——以黄土丘陵沟壑区为例[J].生态学报,2007,(7):3 081-3 089.
[12] 丁敏,庞奖励,刘云霞,等.黄土高原不同土地利用方式下土壤颗粒体积分形特征[J].干旱区资源与环境,2010,24(11):161-165.
[13] 金菊良, 杨晓华, 丁晶. 标准遗传算法的改进方案——加速遗传算法[J]. 系统工程理论与实践, 2001,21(4):8-13.
[14] 郑子成,李卫,李廷轩,等.基于分形理论的设施土壤水分特征曲线研究[J].农业机械学报,2012,43(5):49-54.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |