Spectral Response of Potato Crop to Accumulative Moisture Stress Estimated from Hydrus-1D Simulated Daily Soil Moisture
- PDF / 985,540 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 16 Downloads / 176 Views
RESEARCH ARTICLE
Spectral Response of Potato Crop to Accumulative Moisture Stress Estimated from Hydrus-1D Simulated Daily Soil Moisture During Tuber Bulking Stage Dibyendu Dutta 1 & Prabir Kumar Das 1 & Soubhik Paul 1 & Tanmay Khemka 1 & Manoj Kumar Nanda 2 & Vinay Kumar Dadhwal 3
Received: 13 May 2015 / Accepted: 13 September 2015 # Indian Society of Remote Sensing 2016
Abstract The accumulative moisture stress of potato crop was detected using Field Spectroradiometer data. Different degree of stress was created by manipulating the amount and interval between two consecutive irrigations. The daily soil moisture was simulated using Hydrus-1D and validated (r= 0.805 and RMSE=0.015). The ambient soil moisture 0.9), at higher level of accumulative stress beyond 5.0, the values get saturated except for 1091–1303 nm. Hence, the band-depth-maxima at 1091–
* Dibyendu Dutta [email protected] Prabir Kumar Das [email protected] Soubhik Paul [email protected] Tanmay Khemka [email protected] Manoj Kumar Nanda [email protected] Vinay Kumar Dadhwal [email protected] 1
Regional Remote Sensing Centre- East, NRSC, Kolkata, West Bengal, India
2
Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, West Bengal, India
3
National Remote Sensing Centre, Hyderabad, Andhra Pradesh, India
1303 nm is sensitive to wider range of stress and may be used for targeted irrigation technique to maintain safe irrigation zone. Keywords Accumulative moisture stress, Band depth maxima, Hydrus . 1D, Hyperspectral remote sensing, Potato
Introduction Potato (Solanum tuberosum) is an important food crop of India and used as vegetable, stock feed and in industries for manufacturing starch, alcoholic beverages and other processed products. Nearly 80 % of potatoes are grown in vast Indo-Gangetic plains of north India during short winter days from October to March. The crop is normally grown as irrigated crop and highly sensitive to water stress. Any shortfall during critical growth stages affect the yield and quality of tubers significantly. Relatively shallow root system coupled with low water holding capacity of light textured soils aggravates the risk. Water stress may affect potato growth and production by reducing the amount of productive foliage, decreasing the rate of photosynthesis per unit of leaf area and by shortening the vegetative period. Insufficient water supply in the period between emergence and the beginning of tuber bulking may seriously affect the growth rate of foliage while the reduced root development limits the plant’s ability to take up water and nutrients from deeper layers. The immediate response of plant to water stress is by closing the stomata and cutting down the CO2 intake, lowering the rate of translocation of starch and sugars from leaves to the tubers. Changes in plant water status influence both chemical and structural properties of leaves and in turn their bio-optical response. Besides changes in physiology and bio-chemical properties water deficit can also affect the reflectance characteristic
Data Loading...
