Growth and Grain – Yield of Chaiya Rice under Different Plant Densities and Using Parachute Planting Method

Suchart Choengthong

Abstract


Abstract

 

         The effect of planting density on growth and grain - yield of Chaiya rice using parachute planting method was examined at Patumthani Rice Research Center, during September, 2014 to May, 2015. The particular objective was to examine the suitable planting density when parachute planting method was applied. Five densities of Chaiya seedling were thrown similar to parachuting.  Those densities were 22,400, 30,720, 38,400, 48,000 and 56,320 clumps per rai.

              Pre - heading growth varied greatly among densities; this variation was partly related to the number of tillers, lower densities having more tillers per clump than higher densities, respectively. The relationship between tiller number and plant height was not similar. The heights of rice at densities of 22,400, 30,720, 38,400, 48,000 clumps per rai were not significant different within the group but these were significant different with the planting density of 56,320 clumps per rice.

Low densities promote head development as the number of head per clump was higher than those of high densities in most densities. No significant effect of density on filled - grain and unfilled - grain per head.  Seed weight per clump showed significant different between densities except between those of 38,400 and 48,000 clumps per rai.  Grain - yield varied among densities. Chaiya rice with 22,400 clumps per rai had the highest yield at 786.38 kg. per rai. However, it was not significant different with the yields of rice at densities of 30,720 and 38,400, clumps per rai.  However, grain - yield of rice planted at 48,000 and 56,320 clumps per rai was significantly lower than that of 22,400 clumps per rai.   It is conclude there was consistent effect of plant density on growth and yield of Chaiya rice using parachute planting method.


Keywords


Chaiya rice, parachute planting method, density, growth, grain-yield

References


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Prasert Kosulwitr. 2009. Parachuting in Rice, Save seed and control of weed. Kaset Thammachart. Vol. 10 Bangkok. Thailand.

Sumran Intalang., Nittaya Chuensuk., and Wasana Intalang. 2005. Rice Weed Control and Weed Control in Rice Grown using Parachute method (unpublished paper). Pathum thani Rice Research Center. Pathum thani. Thailand.


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