Modeling phosphorus distribution under different fertigation strategies in onion (Allium cepa L.) crop
Journal Title: Journal of Applied and Natural Science - Year 2017, Vol 9, Issue 2
Abstract
The understanding of soil and nutrient dynamics under drip fertigation is relevant for crop production as well as water and nutrient management. The aim of this study was to generate information about the distribution of phosphorus (P) under different fertigation strategies for onion production on sandy clay loam soil during 2007-2008 to 2008-2009. The study involved field experiment, laboratory analysis and modeling of P distribution. The phosphorus distribution data in the field were collected, analyzed and used to calibrate and validate the solute transport model HYDRUS-2D for sandy clay loam soil. The performance of HYDRUS-2D was evaluated by comparing its simulated values with the observed values of soil moisture and nutrient concentration. The coefficient of determination (R2), root mean square error (RMSE) and mean absolute error (MAE) were used as model performance indicators. The range of R2 between 0.72-0.99 for water as well as nutrient distribution indicates good correlation between the observed and simulated values. The MAE and RMSE values for water and nutrient distribution were in between 0.0009 to 0.0039 which indicated the accuracy of the model. From these results, it can be concluded that the model is performing well for predicting the P concentration in the soil as well as the soil moisture distribution for onion crop grown under sandy clay loam. The model was also validated for water and phosphorus distribution with the observed values at the end of the crop season and found to be performing well. The HYDRUS-2D model may be used to carry out simulations for different soil types and with different fertigation and irrigation strategies for developing guidelines.
Authors and Affiliations
Sanjay T. Satpute, Man Singh
Keywords
Related Articles
- EP ID EP286466
- DOI 10.31018/jans.v9i2.1264
- Views 93
- Downloads 0
Effect of elicitors on physiomorphological and biochemical parameters of Indian mustard (Brassica juncea) and rapeseed (B. napus)
The present investigation was aimed to assess the effect of different concentrations of elicitors viz., salicylic acid (SA) and benzothiadiazole (BTH) on physiomorphological and biochemical parameters of Brassica juncea...
Effect of Growth hormones for direct organogenesis in Bael (Aegle marmelos (L.) corr)
Aegle marmelos (L.) corr. commonly known as ‘Bael’ tree is included in the red- listed medicinal tree in South India. Riped and unripe fruits, root, bark and leaves of the tree are used in ayurvedic preparation for vario...
Morphological and Biochemical Analysis of Cicer arietinum L. under Paper Industrial Effluent Stress conditions
To study the effect of paper industrial effluent on chickpea (Cicer arietinum L.) along with different concentration (10%, 20% 40%, 60% 80% and 100%) and pure tape water as a control to compare the effect of paper indust...
Mungbean yield and nutrient uptake performance in response of NPK and lime levels under acid soil in Vindhyan region, India
2016A field experiment was conducted to understanding the management of soil acidity with NPK and lime levels for sustainable mungbean productivity, Crop was sown during kharif season of 2014at Agronomy farm of Rajiv Gan...
In-vitro analysis of potential antibacterial activity of three medicinal plants
he present study was aimed to examine and compare the antibacterial activity of hot methanolic extract of medicinal plants viz. Portulaca oleracea (purslane), Syzygium cumini (L.) (jamun), Psidium guajava (L.) (guava). A...