Studies on seedling establishment of directly seeded 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

Two separate greenhouse experiments were conducted from August 1968 to February 1969 with two major objectives: I) to evaluate the effects of water depth on seedling establishment of some improved rice varieties; 2) to determine the feasibility of using chemicals to improve germination and seedling establishment of rice.

In general, the result obtained from a test of seedling establishment of water seeded rice indicate that the permissible range of water depth should be from 2.5 cm. to 5.0 cm. The percentage seedling survival 30 days after seeding was highest at these depths of water. Among the test varieties, IR8(68) and Milpal 4, a tall upland rice variety have the best seedling survival. In terms of root length, increasing the depth of water drastically shortened the root length of seedlings. Perhaps, this was due to the low concentration of dissolved oxygen in deep water.

In the other test involving the use of chemicals to improve generation and seedling vigor of rice, the results tended to indicate the germination of C4-63 seeds was not affected markedly. However, soaking the seeds in NaCCl solution increased markedly the root and shoot length to the control (distilled water) but decreased significantly the number of roots produced per seedling. The overall results seemingly indicate that NaCCl can be used effectively in improving the seedling vigor of C4-63 buut nnot in improving its germination capacity.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1969 A42 T73

Document Type

Thesis

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