Abstract
The PadiU Putra rice line is a blast-resistant and high-yield rice line with high potential. The application of topdressing and the foliar applied method of silicon (Si) treatments could strengthen the culm to resist breakage and ultimately increase yield production. Treatments which consisted of a control, a Si topdressing, and a Si foliar applied were arranged in a randomised complete block design. At 55 days after transplanting (DAT), the foliar applied Si treatments had 59% higher dry matter partitioning to the roots. Meanwhile, at 75 DAT, both Si foliar applied and topdressing method showed increased assimilate partitioning into the culm sheath by 29% and 49%, respectively. Dark green and light yellowish colours were obtained in both Si treatments using UAV, indicating similar results to physiological responses. Remarkably, Si foliar applied treatments enhanced the diameter and width of the outer and inner layers of the diameter of vascular bundles at 75 DAT by 58, 181, and 80%, respectively. The yield production of rice increased by 53% in the Si foliar applied, compared to the control, and produced a 1.63 benefit-cost ratio.
Highlights
Rice, Oryza sativa L., is a major cereal crop
A new variety of rice, currently called PadiU Putra, was developed by [4, 5], in which resistance genes from the rice variety Pongsu Seribu 2 were pyramided into MR219
The results showed that the use of Si foliar applied and topdressing treatments showed significantly reduced plant height by 17 and 13% at 55 days after transplanting (DAT), respectively, compared to the control
Summary
Oryza sativa L., is a major cereal crop. Sixty per cent of the global population (4.5 billion) lives in Asia, a figure which will increase to 9.3 billion in the year 2050. A new variety of rice, currently called PadiU Putra, was developed by [4, 5], in which resistance genes from the rice variety Pongsu Seribu 2 were pyramided into MR219. This new variety is claimed to be a blast-resistant rice variety with high yield potential and is to be released for commercial cultivation [5]. Lodging is defined as the permanent displacement of a stem from its upright position [6] It mostly occurs just before harvest when the plant, in particular the lower portion of the stem, is unable to withstand the weight of the panicle. Three types of lodging have been recorded, namely, bending of stems at the base, breakage of stems at any point along the length, and root lodging [7]
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