Abstract
Indigofera zollingeriana is one of Indigofera species distributed in Indonesia and known as forage crop. Seed is an important factor which influences cultivation of I. zollingeriana due to low seed germination. The objective of the research was to determine the effect of different pre-treatment as chemical scarification (98% of H2SO4, 0.3% of KNO3, glycerine (C3H8O3) at 70oC), hot water at 70oC with different duration of immersion or soaking and mechanical scarification using sand paper on I. zollingeriana’s seed germination. Pre-treatment had significant differences and improved germination percentage, germination speed index and shoot length. The positive correlation was noted between germination percentage and germination speed index.
Highlights
Indiofera zollingeriana is one of the widely used forage plant species used in Indonesia due to high quality forage production and adaptability to drought stress under tropic conditions (Abdullah, 2010; Herdiawan and Sutedi, 2012)
Harrington (1916) observed that most of this is physical dormancy caused by hard seed coat that results in slow germination and development of plants
The seeds were scarified with 0.3% KNO3 (Potassium nitrate) for 12, 24, 36 and 48 h and C3H8O3 at 60oC for 30, 60, 90 and 120 min
Summary
Indiofera zollingeriana is one of the widely used forage plant species used in Indonesia due to high quality forage production and adaptability to drought stress under tropic conditions (Abdullah, 2010; Herdiawan and Sutedi, 2012). The plant has protein rich leaves with low tannin, lignin and cellulose contents, utilisable fibre (NDF and ADF) and high dry matter digestibility (Abdullah, 2010). Harrington (1916) observed that most of this is physical dormancy caused by hard seed coat that results in slow germination and development of plants. The seed condition (quality) is one of particular importance to plant cultivation in agriculture sector that rely on seed germination
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