Planting pattern and nitrogen response of college bred glutinous rice

Date

4-1969

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Basilio B. Mabbayad

Abstract

Grain yield increased in inverse relation to plant spacings in both seasons. Closer plant spacings (20 X 20 and 50 x 8 cm) gave significantly higher yields than wider spacings (40 x 4o cm, 50 x 32 cm, 30 . 30 cm. and 50 x 18 cm).

The interaction between fertilizer and spacing and that between fertilizer and variety were significant during the dry season but not during the wet season planting. The magnitude of the increase in yield with increasing spacing was greater at low nitrogen level (60 kg/ha) than at high nitrogen level (100 kg/ha.).

There was no significant difference in the percent-age of sterile spikelets as affected by nitrogen fertilizer, plant arrangement and spacing in the wet season. However, the plants at wider spacings (50 x 32 cm and 40 x 40 cm) produced more sterile spikelets in the dry season. Also, the tiller and dry matter production increased with increasing spacing under low and high fertility levels in both seasons.

The relationship between the leaf area index at flowering and grain yields indicates that the bigger the leaf area index, the more the grain production. Also, the bigger the leaf area index at flowering, the smaller the light transmission ratio.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1969 A42 T87

Document Type

Thesis

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