sodininkystė ir daržininkystė 25(4)

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SODININKYSTË IR DARÞININKYSTË. SCIENTIFIC ARTICLES. 2006. 25(4).
AGROBIOLOGICAL EVALUATION OF PLANTS FOR
GREEN MANURE AND IT’S INFFLUENCE ON YIELD
R. Starkutë, L. Duchovskienë, V. Zalatorius
Summary
In 2003–2005 in Lithuanian Institute of Horticulture in trial field for ecologically
grown vegetables there were investigated and evaluated plant availability for green
manure and estimated it’s influence on ecologically grown onions yield. Investigated
plants: barely, barely with undesown clover, summer wheat, peas and outs, rape.
Control treatment – black fallow.
Was estimated that biomass of plants for green manure leaves in the soil different
amount of organic matter.
The highest amount of green matter – 43.2 t ha -1 was get from peas and outs,
summer wheat -32.5 t ha -1 , barely with undesown clover – 30.2 t ha -1 , lowest –
barely and rape (24.5 and 27.0 t ha -1 ).
There were not found any significant differences of amount of Thrips tabaci
between treatments.
Green manure from peas and outs increase onions yield by 3.1%; green manure
from summer wheat – 5.7%, green manure from barely with undersown clover –
7.3%. The lowest impact for onion yield has had green manure from barely and
rape.
The highest number of weeds (191 unit/m 2 ) was found in onions grown after
barely with undersown clover, lowest number – 29 unit/m 2 in onions grown after
peas and outs.
Key words: biomass, dry matter, onions, plants for green manure, onion thrips,
weeds.
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