Malaysian Applied Biology Journal

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Malays. Appl. Biol. (2007) 36(1): 41–45



School of Environmental and Natural Resource Sciences Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor D.E. Malaysia
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Laboratory and greenhouse studies were conducted to determine the effect of planting depth, water depth, soil moisture and environmental factors such as light and temperature on the germination and emergence of Cyperus difformis seeds. The results showed that the total germination was highest at alternating temperatures regimes of 25/ 30°C. Light is an important factor in the germination of Cyperus difformis seeds as germination is inhibited in the dark. The highest percentage emergence of Cyperus difformis seedlings was observed when the seeds were sown at the soil surface (0 cm depth), with no emergence at 1 cm depth onwards. Higher germination occurred at 100% soil moisture content but decreased as the soil moisture content decreased. The highest percentage emergence was observed at saturated water conditions of the soil surface and it decreased with increased submergence.


Kajian makmal dan rumah hijau berkaitan kesan kedalaman, kedalaman air, kelembapan tanah dan faktor persekitaran seperti cahaya dan suhu ke atas percambahan dan kemunculan biji Cyperus difformis telah dijalankan. Hasil menunjukkan bahawa jumlah percambahan adalah tinggi pada suhu berselang 25/30°C. Cahaya merupakan faktor penting dalam mempengaruhi percambahan biji C. difformis yang mana percambahan direncat dalam gelap. Percambahan tertinggi anak benih C. difformis berlaku apabila biji disemai di atas permukaan tanah (kedalaman 0 cm), dan percambahan tidak berlaku pada kedalaman 1 cm atau lebih. Percambahan tertinggi berlaku pada kelembapan tanah 100% tetapi berkurangan apabila kelembapan berkurangan. Kemunculan dikesan pada keadaan tanah yang tepu air tetapi bilangan ini berkurangan apabila kedalaman air meningkat.

Key words: Cyperus difformis, factors, germination, seeds.


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