Light interception and radiation use efficiency of wheat varieties as influenced by number of irrigations

Abstract

An experiment was conducted during rabi seasons of 2002-03 and 2003-04 to quantify the light interception and radiation use efficiency for three wheat varieties as affected by variable number of irrigations with the combination of three wheat varieties viz., HUW-234, HD-2285 and PBW-154. The light interception increased successively till 90 days after sowing (DAS) and thereafter a gradual decrease was observed till maturity of the crop. Four irrigations given at CRI, late tillering, late jointing and ear head formation stages showed highest radiation interception followed by three and two irrigations, however, the lowest radiation interception was observed for wheat crop receiving one irrigation only. On an average, 19.08 % and 12.79 % increase in radiation interception was found for wheat crop irrigated four and three times respectively as compared to singly irrigated crop. Highest radiation interception was recorded with HUW 234 followed by HD 2285 at all the growth stages except 15, 30, 45 DAS. More light interception reflected in significantly superior yield and yield attributes in the order of I4>I3>I2>I1. Subsequently, radiation useefficiency (RUE) also followed the similar trend showing highest and lowest RUE with four and one irrigation respectively. Among the different varieties, HUW-234 recorded highest radiation use efficiency followed by HD-2285. The average RUE during the entire growing period for HUW-234 and HD-2285 was found to be 1.68 g MJ-1 and 1.63 g MJ-1 respectively, which was 4.83 and 1.95 % higher than PBW-154.

Mangrove sediments-associated bacterium (Bacillus sp. SW7) with multiple plant growth-promoting traits promotes the growth of tomato (Solanum Lycopersicum)

“…PGP bacteria mitigate the salinity damage in several crops through various mechanisms, including improved water uptake and osmolyte accumulation (glutamate, glycine betaine, proline and soluble sugars). Also, PGP bacteria increases antioxidant levels, synthesis of ACC deaminase, exopolysaccharides production and ionic homeostasis, which in turn enhances agricultural productivity even in saline-alkaline soil (Mishra et al, 2023). Currently, studies in various parts of the world are reporting improvements in the growth and production of crops such as tomatoes (Fan et al, 2016;Astorga-Elóet al, 2021), maize (Ojuederie and Babalola, 2023), and wheat (Shankar and Prasad, 2023), attribute to the use of PGP bacteria.…”

“…Microbes associated with the mangrove are known to tolerate high salinity. Several studies have demonstrated that bacterial isolates from mangrove sediments and rhizosphere have PGP potentials, make them potential sources for isolating PGP strains (Mishra et al, 2023).…”