Research on the Weak Signal Detecting Technique for Crop Water Stress Based on Wavelet Denoising

Abstract

At present, water shortage in agriculture becomes more and more serious. This situation makes it necessary to develop precision irrigation, which needs to obtain the accurate crop water stress in advance. However, this signal is too weak to be detected easily. Wavelet analysis has been widely used in the signal processing area for almost two decades due to its excellent time-frequency analysis ability. Therefore, the wavelet decomposition and reconstruction technique is applied to reduce the noises of experimental data collected from corn plants in a farmland. Finally, data analysis results show that wavelet denoising is effective to achieve the weak signal extraction.

Paprastojo kukurūzo (Zea mays L.) drėgmės streso nustatymas, taikant spektrinį atspindį ir klasifikavimo medžio metodą

“…Water is an important factor in agricultural and food production yet it is a highly limited resource and is becoming increasingly more important over time for optimal crop production (O'Shaughnessy et al, 2011;Wang et al, 2012). Therefore, research on irrigation and water management has focused on crop yield responses to water supply (Chen et al, 2010 a;Köksal, 2011).…”

Evaluation of water-saving rice status based on morphophysiological characteristics and water use efficiency

“…Water has an important role in plant growth (Wang et al 2012). Deficiencies can interfere all plant metabolic processes which have an impact on plant growth, plant development, and decrease in crop yields (Tripathy et al 2000;Manikavelu et al 2006;Venuprasad et al 2011).…”

Modern Era of Rice (Oryza Sativa L.) Genomics for Precise Genomics-Assisted Drought Breeding

“…Water is an important factor in agricultural and food production, yet it is a highly limited resource (Wang et al, 2012). Water deficit stress causes extensive loss to agricultural production worldwide, thus being a severe threat to sustainable agriculture.…”