Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.geoderma.2018.04.014 |
Modelling soil water dynamics and crop water use in a soybean-wheat rotation under chisel tillage in a sandy clay loam soil | |
Ahmad, Mukhtar1; Chakraborty, Debashis1; Aggarwal, Pramila1; Bhattacharyya, Ranjan2; Singh, Ravender1 | |
通讯作者 | Chakraborty, Debashis |
来源期刊 | GEODERMA
![]() |
ISSN | 0016-7061 |
EISSN | 1872-6259 |
出版年 | 2018 |
卷号 | 327页码:13-24 |
英文摘要 | Mechanical chiseling disrupts the sub-surface compaction often found in agricultural soils, and modifies soil physical condition conducive to root growth. However, the effect is transitory and therefore, the impact on soil hydraulic characteristics and consequently on water dynamics must be precisely quantified for effective technology-targeting. In this study, Hydrus-2D was used to describe the soil water change, root water uptake and profile water balance components under different time lags after chiseling. The input parameters were collected from a 2-year field experiment with soybean-wheat crops in rotation on a sandy loam soil in the experimental farm of the ICAR-Indian Agricultural Research Institute, New Delhi. The chisel treatments were residual (RS), repeated (RC) and no chisel (NC). Greater root water uptake in RS and RC compared to the NC could be attributed to marginally higher leaf area index and fIPAR in chiseled plots along with greater depth and spread of roots. Model simulated soil water content was in good agreement with observed data in the first year of rotation. The model was further validated by comparing the simulated and observed values of crop transpiration with R-2 = 0.85 and 0.72 (p < 0.001) in soybean and wheat crop, respectively in the following year. Simulated field water valance components indicated 50-70 mm higher seasonal transpiration by the crops. Chisel plots had significantly higher yield and water use in 1st year soybean-wheat rotation, but the effect of chisel became marginal in the 2nd year rotation. Soil water content profile indicates higher plant-available water in chiseled plots. In view of the cost of chiseling and the marginal benefits obtained till 2nd tear of crop rotation, chiseling once in 2-3 years may be recommended for the sandy loam soils under the semi-arid climate condition. |
英文关键词 | Soil water Root water uptake Chisel Hydrus-2D |
类型 | Article |
语种 | 英语 |
国家 | India |
收录类别 | SCI-E |
WOS记录号 | WOS:000435060200002 |
WOS关键词 | SOLUTE TRANSPORT PARAMETERS ; TRANSIENT FIELD EXPERIMENTS ; DRIP IRRIGATION ; PHYSICAL-PROPERTIES ; ROOT WATER ; HYDRAULIC CONDUCTIVITY ; INVERSE ESTIMATION ; NITROGEN ; GROWTH ; RAINFALL |
WOS类目 | Soil Science |
WOS研究方向 | Agriculture |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/209599 |
作者单位 | 1.ICAR Indian Agr Res Inst, Div Agr Phys, New Delhi, India; 2.ICAR Indian Agr Res Inst, Ctr Environm Sci & Climate Resilient Agr, New Delhi, India |
推荐引用方式 GB/T 7714 | Ahmad, Mukhtar,Chakraborty, Debashis,Aggarwal, Pramila,et al. Modelling soil water dynamics and crop water use in a soybean-wheat rotation under chisel tillage in a sandy clay loam soil[J],2018,327:13-24. |
APA | Ahmad, Mukhtar,Chakraborty, Debashis,Aggarwal, Pramila,Bhattacharyya, Ranjan,&Singh, Ravender.(2018).Modelling soil water dynamics and crop water use in a soybean-wheat rotation under chisel tillage in a sandy clay loam soil.GEODERMA,327,13-24. |
MLA | Ahmad, Mukhtar,et al."Modelling soil water dynamics and crop water use in a soybean-wheat rotation under chisel tillage in a sandy clay loam soil".GEODERMA 327(2018):13-24. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。