Influences of transplanting patterns and spacing on rice yield and weeds population
2000
Chaiyot Supatanakul | Benjapol Suvanasingha
Field experiment to investigate the effect of transplanting patterns and spacing on rice yield and weeds population was conducted at Weed Science Sub Division Experimental Farm, Bangkhen, Bangkok in 1999 wet season. Experimental design was randomized complete block with 4 replications. There were 6 treatments: square transplanting at 33.3*33.3 cm, 25.0*25.0 cm and 12.5*12.5 cm spacing; and triangular transplanting at 33.3*33.3 cm, 25.0*25.0 cm and 12.5*12.5 cm spacing with Suphan Buri 90, photoperiod insensitive lowland rice was used as tested variety. Transplanting patterns and spacings did not effect plant height, tiller production, panicle no/square m, panicle length, rice grain yield, straw yield and weeds weight. Close spacing increased tiller no/square m, panicle no/square m, rice grain yield, and straw yield but decreased weeds weight. High grain yield as affected by closer spacing was mainly due to higher panicle number per unit area.
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