WEED GROWTH WITH PROVISION MULCHING PADDY STRAW DYNAMICS IN PADDY FIELD AT METHODS SRI (THE SYSTEM OF RICE INTENSIFICATION)
Zulmardi1, Musliar Kasim2, Irawati Chaniago2 and Agustian2
1PhD student in Agronomy of Postgraduate Studies Andalas University, Padang, Indonesia
2Faculty of Agriculture Andalas University, Padang-Indonesia
Corresponding author : Alamat email ini dilindungi dari robot spam. Anda memerlukan Javascript yang aktif untuk melihatnya.
ABSTRACT
To controlling weed growth of paddy rice in the SRI (the System of Rice Intensification) method can be done by using paddy straw mulch. The research method in the form of field trials with a completely randomized design, with a dosage of 15 t/ha and the time of application paddy straw mulch with three modify time. The provision of artificial fertilizer at half the recommended dosage, analysis conducted on weeds and rice yields. The results showed that paddy straw mulching applied twice on rice aged 7 day after planting (DAP) and 14 DAP each half dose gave a decrease in the growth of weeds. Number of weed species and individuals, obtained 12 species with 9,723 individuals. The dominance of the family Poaceae 88% and to Onagraceae 30%, Family Onagraceae relative density of 75.6 individuals/m2 to 66.8 individuals/m2 and family Poaceae of 30.3 individuals/m2 to 14.9 individuals/m2. Dominance species by Echinochloa sp., and Commelina sp. based summed Dominance Ratio (SDR), it indicates a very effective weed control. Rice yield that is 7.32 t.ha-1 that increased by 86.1% compared to the SRI method control, and increased by 106.1% compared with the conventional method.
Keywords: weed dynamics, paddy straw mulch, paddy field, SRI methods