CAJ | 학술논문

以中国科学院栾城农业生态系统试验站的大埋深土壤水分剖面观测设施为依托,利用中子水分仪对15.4 m深度的土壤水分进行连续1年的定位观测,同时通过定期采集深层土壤和水分样品,对该区土壤水分变动特征和深层入渗量进行了定量研究.结果表明:土壤水分在垂直剖面上的分布受土壤质地组成控制,同时在年内受降水事件和灌溉的影响而波动,随着土壤深度的增加,土壤水分的变异性呈减弱趋势;根区土壤水分受降水(灌溉)和作物耗水的共同影响而变化剧烈,根区以下土壤水分对降水的响应有一定延迟;在观测期间,整个15.5 m深度的土壤剖面上有水分的盈余,土壤水贮量增加了216 mm,但在小麦生育期土壤水分表现出耗损过程(土壤水贮量减少了208 mm).最后利用氯质量平衡法估算560 cm 深度处渗漏量约为65 mm.
이중국과학원란성농업생태계통시험참적대매심토양수분부면관측설시위의탁,이용중자수분의대15.4 m심도적토양수분진행련속1년적정위관측,동시통과정기채집심층토양화수분양품,대해구토양수분변동특정화심층입삼량진행료정량연구.결과표명:토양수분재수직부면상적분포수토양질지조성공제,동시재년내수강수사건화관개적영향이파동,수착토양심도적증가,토양수분적변이성정감약추세;근구토양수분수강수(관개)화작물모수적공동영향이변화극렬,근구이하토양수분대강수적향응유일정연지;재관측기간,정개15.5 m심도적토양부면상유수분적영여,토양수저량증가료216 mm,단재소맥생육기토양수분표현출모손과정(토양수저량감소료208 mm).최후이용록질량평형법고산560 cm 심도처삼루량약위65 mm.
@@@@In this paper, the observation equipment of deep soil water profile in the Luancheng ecological experiment station of Chinese Academy of Sciences w as used to perform in2situ measurements of the soil w ater content in the dept h of 15. 4 m of soil profile for one continuous year based on the neutron moisture view er. T he deep soil and w ater sam ples were col ected regularly, which were used to perform quantitative analysis of the variation of soil wat er content and deep drainage. The results show ed that the distribution of soil moisture in the vertical profile is controled by the soil texture, and the variability of soil moisture de2 creases w ith the depth of soil. Meanwhile, the distribut ion of soil moisture w as affected by the precipit ation and irrigation within a year. Due to the effects of precipitation ( irrigation) and evapot ranspiration, dramatic variations of soil moisture occurred in the root zone. However, t he response of soil moisture to the precipit at ion w as delayed below the root zone. During t he observation period, there w as abundant w ater for the whole soil profile in the depth of 15. 5 m and the soil water storage increased by 216 mm. H ow ever, the soil water cont ent decreased in the w heat seasons and the soil water storage decreased by 208 mm. Est imated by the chloride mass balance method, the deep drainage w as almost 65 mm in t he depth of 560 cm of the soil prof ile.