Foliar fertilizer application of NPK+ME and controlled soil drying during reproductive stage in lowland rice (Oryza sativa L.)

Date

12-2014

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Pompe C. Sta. Cruz

Restrictions

Restricted: Not available to the general public and to those bound by the confidentiality agreement. Access is available only after consultation with author/thesis adviser.

Abstract

NSIC Rc276, NSIC Rc282, IR20 and 'Salumpikit' were grown in a screenhouse and subjected to varying treatments: well-watered and controlled soil drying 10 DAA, with or without additional application of foliar fertilizer at anthesis. Growth parameters and yield components were observed to determine the effect and identify the responsive variety on water and fertilizer treatments. Among genotypes, the two rainfed lowland rice varieties (NSIC Rc276 and NSIC Rc282) had the highest shoot dry weight, number of panicles per hill, number of spikelets per panicle and grain yield. Consistently lowest for majority of the parameters was IR20. It can be noted that NSIC Rc282, which exhibited the highest grain yield per hill, also had consistently higher number of panicle per hill and number of spikelets per panicle among genotypes. On the other hand, 1000-grain weight of rice plants generally was significantly greater in well-watered condition than in controlled soil drying. Moreover, plants with additional foliar fertilizer at anthesis had significantly higher 1000-grain weight than plants without foliar fertilizer. The highest significant 1000-grain weight was obtained in well-watered condition with additional foliar fertilizer applied at anthesis, followed by the well-watered treatment, and the controlled soil drying alone.Although 1000-grain weight, another yield component, was significantly affected by W+F treatments, W+F treatments did not significantly affect grain yield per hill. It seems that the contribution of grain weight was not enough to cause a similar effect of W+F treatments in grain yield per hill. Spikelet fertility ranged 34.1-72.2%. ?Salumpikit? had the highest percent filled spikelet under well-watered condition, while NSIC Rc276 had the lowest percent filled spikelet in controlled soil drying condition. Moreover, application of foliar fertilizer to well-watered plants did not result to significant difference in percent filled spikeletamong rice genotypes. At controlled soil drying, IR20 showed the significantly lowest percent filled spikelet among varieties. Addition of foliar fertilizer to plants under controlled soil drying condition did not result in any significant difference among the rice genotypes. Overall, the highest percent filled spikelet was observed in ?Salumpikit? at WF0 then at DF1. It was followed by NSIC Rc282 at WF0, then NSIC Rc276 at DF1. IR20, the drought susceptible variety, exhibited the lowest PSF at DF0. Over-all, although the water+fertilizer treatments did not have significant effect on most parameters, better growth and development of plants was generally observed under well-watered than controlled soil drying condition, and with additional application of foliar fertilizer at anthesis. Moreover, the recently released NSIC varieties (NSIC Rc282 and NSIC Rc276) outperformed the check varieties in all parameters measured.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2014 A3 /A44

Document Type

Thesis

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