Yield components of two rice cultivars in three different spatial arrangements and zero chemical input conditions.
1994
Plaza J.O. | Mendoza T.C.
The study was conducted to determine yield responses of two rice cultivars in two seasons of planting (February to June 1992 and December 1992 to March 1993) under three different spatial arrangements namely: quadruple rows of 10 x 10 cm spaced at 70 cm apart (S1), single rows at 40 x 10 cm (S2), single rows at 20 x 20 cm (S3). The treatments were set out on experimental plots put on fallow or have not been applied with fertilizers or pesticides at the Central Experiment Station, University of the Philippines at Los Banos, College, Laguna [Philippines]. The results of the study showed that tillers formed, number of the productive tillers and the number of filled grains were significantly affected by spacing. Highest number of tillers (16.75) was observed both in S2 and S3 arrangements while highest number of productive tillers (13.5) and number of filled grains per panicle (93.4) were highest in S2 spacing. In comparing cultivar performance, cv. Masipag selection gave high grain yield, number of filled grains, harvest index value (0.50) and grain compared to cv. BS Nagcarlan. Arrangement consisting of single rows spaced at 40 x 10 cm appeared best for zero input rice culture. Higher density arrangement, S1 did not provide encouraging results and reasons for this are provided.
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