EFFECTS OF PLANT DENSITY AND TOPPING ON YIELD, YIELD COMPONENTS AND COMPETITION OF CORN AND SOYBEAN GROWN IN MIXTURE

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GHESHM R.; TAJBAKHSH M.

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Journal: Agricultural Sciences and Technology Year:2001 | Volume:15 | Issue:2 Page(s): 65-73

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Title

EFFECTS OF PLANT DENSITY AND TOPPING ON YIELD, YIELD COMPONENTS AND COMPETITION OF CORN AND SOYBEAN GROWN IN MIXTURE

Author(s)

GHESHM R. | TAJBAKHSH M. | Issue Writer Certificate

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Abstract

The yield advantage and inter-specific completion were studied in corn-soybean mixtures. Species monocultures and all combinations of 3 corn densities (5.5, 7.5 and 9.5 plant/m2) and 3 soybean densities (23, 33 and 43 plant/m2) were plants in a complete randomized block design with factorial arrangement and 3 replicates. Topping treatment on corn was conducted at soft dough stage and data analysed as a split plot design where topping were allocated to main plots. Ignoring the soybean density, increase in corn density to 9.5 plant/m2 led to an increased corn grain yield in mixture. The highest grain and biological yield of soybean was obtained in mixture with medium corn and low soybean densities (7.5 and 23 plant/m2, respectively). Corn topping led to a increase in corn grain no. per row and 500 grain weight of soybean. However, the other yield components of species were not significantly affected by this treatment. Reciprocal yield models showed that in corn intra-specific competition and in soybean inter-specific competition were the main determinates of grain and biological yield. That is corn was the dominant species of mixture. When corn topping was conducted the effect of each corn plant on grain and biological yield of soybean was respectively, equivalent to 9.37 and 9.14 soybean plant. However, this equivalency in control treatment was increased to 11 and 13 soybean plant, respectively. That is, corn competitive ability decreased after topping. This result was confirmed according to completion indices. Land Equivalent Ratio (LER) of mixtures increased with increasing spices density in mixture. Corn topping was also led to an increase in LER so that the highest LER in topping and non-topping treatments were 1.215 and 1.078, respectively.

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APA: Copy

GHESHM, R., & TAJBAKHSH, M.. (2001). EFFECTS OF PLANT DENSITY AND TOPPING ON YIELD, YIELD COMPONENTS AND COMPETITION OF CORN AND SOYBEAN GROWN IN MIXTURE . AGRICULTURAL SCIENCES AND TECHNOLOGY, 15(2), 65-73. SID. https://sid.ir/paper/22423/en

Vancouver: Copy

GHESHM R., TAJBAKHSH M.. EFFECTS OF PLANT DENSITY AND TOPPING ON YIELD, YIELD COMPONENTS AND COMPETITION OF CORN AND SOYBEAN GROWN IN MIXTURE . AGRICULTURAL SCIENCES AND TECHNOLOGY[Internet]. 2001;15(2):65-73. Available from: https://sid.ir/paper/22423/en

IEEE: Copy

R. GHESHM, and M. TAJBAKHSH, “EFFECTS OF PLANT DENSITY AND TOPPING ON YIELD, YIELD COMPONENTS AND COMPETITION OF CORN AND SOYBEAN GROWN IN MIXTURE ,” AGRICULTURAL SCIENCES AND TECHNOLOGY, vol. 15, no. 2, pp. 65–73, 2001, [Online]. Available: https://sid.ir/paper/22423/en

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