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Influence of preplant tillage, seeding rate and weed control method on weed population and performance of wet seeded rice / by Soepraptini Heoetadji

By:

Heroetadji, Soepraptini [author]

Contributor(s):

Mabbayad, Basilio B [adviser]

Material type: Text

TextLanguage: English Publication details: Los Baños, Laguna, 1982. Cavite State University- Main Campus,Description: 85 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

631.51 H43 1982

Online resources:

Click here to view thesis abstract and table of contents

Abstract: SOEPRAPTINI HEROETADJI, University of the Philippines at Los Banos, October, 1982. Influence of Preplant Tillage, Seeding Rate and Weed Control Method on Weed Population and Performance of Wet Seeded Rice. Major Professor: Dr. Basilio B. Mabbayad. Weed population was more affected by weed control treatment than tillage system or seeding rate. Hand- weeding was the best way of decreasing weed biomass. weed control method effect was more pronounced on rice performance than tillage system or seeding rate. Grain yield of rice UPLRi-5 variety was affected by tillage system, weed control system and interaction of seeding rate and weed control method. Conventional tillage resulted in higher grain yield than those-—of stale seedbed system. | Hand Weeding once and twice did not affect grain yield which likely depended on percentage of productive tiller, and unfilled spikelets/ panicle. However, at seeding rate, of 80, 120 and 160 kg/ha, the highest grain yield was obtained from hand+ sea aes . cA wedding once which was not significantly different with handweeding twice. On the other agronomic characters of rice, conventional tillage resulted in higher productive tillers aé_oobpetoe-ne the stale seedbed tillage. Some weed control methods had no significant effect on leaf area index (LAI) at vegetative stage, blooming days and 100- grain weight. However, it increased grain yield, percentage of productive tillers, percentage of filled spikelets/panicle, LAI at blooming stage, dry matter production at vegetative stage and plant height at harvest time. Seeding rate had no effect on rice performance except on percentage of unfilled spikelets/ panicles. Percentage of unfilled spikelets/panicles increased with increasing seeding rate. At all three nan © an seeding rates, unweeding’ treatment resulted, the lowest percentage of productive tillers.

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Title notes ( 4 )

Holdings
Item type	Current library	Collection	Call number	Materials specified	URL	Status	Notes	Date due	Barcode
Theses / Manuscripts	Ladislao N. Diwa Memorial Library Theses Section	Non-fiction	631.51 H43 1982 (Browse shelf(Opens below))		Link to resource	Room use only	T-1356		00002278

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Thesis (M.S. - - Agronomy) University of the Philippines, College, Laguna.

Includes bibliographical references.

SOEPRAPTINI HEROETADJI, University of the Philippines at Los Banos, October, 1982. Influence of Preplant Tillage, Seeding Rate and Weed Control Method on Weed Population and Performance of Wet Seeded Rice. Major Professor: Dr. Basilio B. Mabbayad.

Weed population was more affected by weed control treatment than tillage system or seeding rate. Hand- weeding was the best way of decreasing weed biomass. weed control method effect was more pronounced on rice performance than tillage system or seeding rate. Grain yield of rice UPLRi-5 variety was affected by tillage system, weed control system and interaction of seeding rate and weed control method. Conventional tillage resulted in higher grain yield than those-—of stale seedbed system. | Hand Weeding once and twice did not affect grain yield which likely depended on percentage of productive tiller, and unfilled spikelets/ panicle. However, at seeding rate, of 80, 120 and 160 kg/ha, the highest grain yield was obtained from hand+ sea aes . cA wedding once which was not significantly different with handweeding twice.

On the other agronomic characters of rice, conventional tillage resulted in higher productive tillers aé_oobpetoe-ne the stale seedbed tillage. Some weed control methods had no significant effect on leaf area index (LAI) at vegetative stage, blooming days and 100- grain weight. However, it increased grain yield, percentage of productive tillers, percentage of filled spikelets/panicle, LAI at blooming stage, dry matter production at vegetative stage and plant height at harvest time. Seeding rate had no effect on rice performance except on percentage of unfilled spikelets/ panicles. Percentage of unfilled spikelets/panicles increased with increasing seeding rate. At all three nan © an seeding rates, unweeding’ treatment resulted, the lowest percentage of productive tillers.

Submitted to the University Library 01/07/1994 T-1356