Multiple cropping compatibility of cabbage tomato, bush bean and green onion grown in two locations and seasons

Date

3-1979

Abstract

Four test crops; cabbage, tomato, bush bean and green onion were tested in three sperate experiments at UPLB, Laguna and MSAC, La Trinidad, Benguet during both seasons to determine the compatibility of these crops as intercrops and succession crops using yield as the main criterion. Bush sitao pot test was conducted at UPLB as a follow up of the field succession test.

In the intercropping and succession experiments (Expt. I & II) tomato and cabbage yielded more than the other crops which indicates that they are heavy tonner while green onion and bush bean are light tonner ones. The peso values of cabbage and tomato were significant at 0.01 level of probability compared to either bush bean or green onion. In terms of return per peso investment cabbage had the highest followed by tomato while bush bean and green onion reached only the break-even point.

In the intercropping experiment at UPLB, tomato and green onion produced more during the dry season than the rainy season. On the other hand, cabbage produced more during the rainy season than the dry season. At MSAC, cabbage, tomato and bush bean produced more during the dry season than the rainy season while the green onion had the same yield in both seasons.

In the crop combinations, the presence of tomato consistently lowered the yield of cabbage due to smaller and lighter heads at UPLB in the rainy season. While the other crops did not have significant allelopathic effect with other under the conditions of the experiment, there seemed to be slightly incompatibility of the experiment between bush beans and green onions as intercrops.

There was no significant incidence of insect pests and diseases that was attribute to either the cropping systems or crop combinations.

In the successions experiment cabbage, tomato and green onion did not show any self-allelopathy or allelopathic effect with each other in both locations. However, in bush sitao under UPLB conditions, there was a highly significant self-allelopathy. The yield of bush sitao from plots previously planted to bush sitao was statistically lower at 0.01 level of significance compared to the yield of plots previously planted to green onion and cabbage.

Likewise, the plots previously planted to tomato had lower yield of bush sitao compared to the plots previously planted to green onion which was significant at 0.05 level of probability.

The yield of bush bean from plots previously planted to the same crop at MSAC was significantly lower compared to those previously planted to tomato indicating self-allelopathy in bush bean.

The greenhouse experiments (III) in both locations during the rainy seasons did not show any significant differences among the treatments due may be to poor light penetration and high temperature in the glashouse.

In experiment IV, bush sitao affected significantly the rate of germination of All season cowpea. However, this effect did not show up in the yield of the crop.

The residue pot test (Expt. V) showed that the treatments with the most bush sitao residue produced highly significantly lower pod yield of bush sitao compared to the control. This confirms the result of the field experiment that the first crop of bush sitao reduced highly significantly the yield of the succeeding crop of bush sitao.

Soil analysis after the first planting in experiments I, II, V show wide variations in pH, organic matter and phosphorus which may have contributed in the differences in yields of the treatments.

Document Type

Dissertation

Degree

Doctor of Philosophy in Horticulture

College

Graduate School (GS)

Adviser/Committee Chair

Teodoro G. Cadiz

Committee Member

Obdulia F. Sison, Eduvigis B. Pantastico, Igmidio T. Corpuz

Language

English

LC Subject

Multiple cropping

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 996 1979 A42 V53

Notes

Doctor of Philosophy (Horticulture)

This document is currently not available here.

Share

COinS