质地和根系深度对水分探头埋设的仿真模拟

CORC > 水土保持研究所 > 中国科学院水利部水土保持研究所 > 水保所知识产出(1956-2013)

	质地和根系深度对水分探头埋设的仿真模拟
	樊军 ; 王全九 ; 汪羽宁
刊名	排灌机械工程学报
	2013
卷号	31 期号:01 页码:70-05
关键词	土壤水分 soil moisture 土壤质地 soil texture 灌溉 irrigation 计算机模拟 computer simulation 入渗 infiltration
其他题名	Simulated effects of texture and rooting depth
中文摘要	利用Hydrus-1D模型模拟不同植物根系深度和不同土壤质地条件下的土壤水分动态与平衡,研究了根系分布深度和质地对控制灌溉土壤水分探头埋设深度的影响,并利用试验进行了验证.土壤质地和植物根系分布深度对探头埋设深度有显著影响,砂壤土和壤土分别采用高频低灌量和低频率高灌量的方法.浅根系植物(10 cm)在砂壤土条件下探头埋设5 cm深度最佳,但是根系深度增大到30 cm,探头应该埋设到20 cm深度.对壤土而言,利用位于根系1/2至1/3处的探头控制灌溉.太浅的埋设深度会导致灌溉频率增大,太深的埋设可能造成植物缺水.黏土条件下,结果较为复杂,探头的埋设深度需要田间试验研究.研究结果表明:针对具体植物,因其需水规律和生理特征的不同,根据植物需水规律来调整探头的控制范围达到高效节水目的. 更多还原
英文摘要	Soil water dynamics and balance under various rooting depth and soil texture were simulated by the Hydrus － 1D model to investigate the effects of soil texture and rooting depth on sensor depth in soil profile，and the simulated results were validated by experimental efforts． It is concluded that the soil texture and distribution of plant root has significant influence on the sensor depth． Soil moisture sensor should be buried at 5 cm under sand soil for plants with shallow roots ( 10 cm) ，while those should be buried at 20 cm depth for rooting depth of 30 cm． As for loam soil，sensor placement locates in the one third to two third rooting depth is best． Shallow sensor placement could increase irrigation frequency and deep sensor placement could results in plant water stress． The complex results were achieved under fine soil and plants with deep roots，therefore，field observation should be done for the buried depth of sensor in soil profile． In conclusion，it is useful to guide sensor placement by simulation for sand and loam soil，but it is not suitable for clay soil． Optimum sensor placement should be adjusted according to plant water requirement which affected by plant species． More detailed researches should be focused on the situations that sensor buried depth affected by non-uniform irrigation and temporal and spatial variations of plant roots．
公开日期	2014-10-21
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/5585]
专题	水土保持研究所_水保所知识产出(1956-2013)
推荐引用方式 GB/T 7714	樊军,王全九,汪羽宁. 质地和根系深度对水分探头埋设的仿真模拟[J]. 排灌机械工程学报,2013,31(01):70-05.
APA	樊军,王全九,&汪羽宁.(2013).质地和根系深度对水分探头埋设的仿真模拟.排灌机械工程学报,31(01),70-05.
MLA	樊军,et al."质地和根系深度对水分探头埋设的仿真模拟".排灌机械工程学报 31.01(2013):70-05.