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Effect of planting pattern and plant density on growth, yield and yield components of maize (Zea mays L.) in competition with redroot pigweed (Amaranthus retrofelexus)
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Abstract: (6832 Views) |
| To study the effect of planting pattern and plant density on growth, yield and its components of maize in competition with redroot pigweed, an experiment was conducted in a split-split plot arrangement using randomized complete blocks with three replications in 2002-2003 cropping season at Feiz Abad Agricultural Research Station, Qazvin, Iran, Planting pattern of maize ( P1:single row and P2:double rows ) were assigned to the main plots and maize plant density (D1:7 and D2:10 plant.m-2) and weed plant density (C1:0, C2:2 ,C3:6, C4:12 plant.m-2) were randomized in sub-plots and sub-sub-plots, respectively. Analysis of variance showed that planting patterns had no significant effect on plant characteristics. Effects of plant density was significant on maize grain yield and its components ,however,, it was not significant on redroot pigweed characteristics. Effects of plant density of redroot pigweed was significant on maize characteristics. Planting pattern planting density interaction was not significant on measured plant traits, but planting patterns redroot pigweed plant density interaction on maize grain and ear yields as well as redroot pigweed characteristics were significant. The highest grain yield was obtained in P2C1 with 11387.7g.m-2 . Planting pattern redroot pigweed plant density interaction was not significant on measured characteristics in maize, but it was significant on redroot pigwood characteristics. Three way interactions had no significant on measured characteristics of maize but was significant on seed yield components of redroot pigweed. As maize plant density per unit area increased, LAI, CGR, TDW, ear yield and grain yield increased, but the length and diameter of ear and grain no. row-1 in maize decreased . In double rows planting pattern just CGR, LAI, TDW of maize were significantly higher than single row planting pattern. However, in single row planting pattern of maize LAI, CGR and TDW of redroot pigweed were greater than double rows planting pattern. In conclusion, P2C4 and P1C4 were higher in TDW, plant height , ear yield and grain yield where D1C4 had the highest seed no. and seed yield in redroot pigweed. |
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| Keywords: Competition, Growth indices, Maize, Plant density, Planting pattern and Redroot pigweed |
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Full-Text [PDF 421 kb]
(1470 Downloads)
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Type of Study: Scientific & Research |
Subject:
Special
Received: 2015/02/23 | Accepted: 2015/02/23 | Published: 2015/02/23
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