EVALUATION OF TWO CORN CULTIVARS UNDER MIX-CROPPING SYSTEM USING DIFFERENT PLANT DENSITIES

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SADEGHZADEH HEMAYATI S.; SIADAT SEYED ATA ELAH; SADEGHZADEH HEMAYATI F.; VALIZADEH MOSTAFA; FATHI GHODRAT ELAH

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Journal: THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA) Year:2002 | Volume:25 | Issue:1 Page(s): 73-88

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Title

EVALUATION OF TWO CORN CULTIVARS UNDER MIX-CROPPING SYSTEM USING DIFFERENT PLANT DENSITIES

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Keywords

CORN. CULTIVAR MIXED-CROPPINGQ2

PLANTING DENSITYQ4

Abstract

To determine the optimal planting densities and evaluate the yield possibility of com cultivar under mix-cropping system in Dezful region, a factorial design based on Randomized Complete Blocks Design with four replications was carried out in 1999 at Dezful. Four planting densities including of 65000, 75000, 85000 and 95000 plants/ha, in different combination with the pure stands of two hybrid (SC704 and SC711) along with three mixed cropping ratios [including of 3(SC704):1(SC711), 2(SC704):2(SC711) and 1(SC704):3(SC711)] comprised the twenty experimental treatments. Data collected were analysed to determine the optimal cultivar mix-cropping ratio by using both agronomical and computational indices and reciprocal yield model.Results showed that intercropping of com hybrids and increased SC711 in mix systems caused the reduction in tassel and silk appearance intervals by 5.97 days the 1(SC704):3(SC711) mix ratio. an increase in leaf angle and horizontal arrangement of leaves in canopy. The grain yield of pure cultivation of SC704 and 3(SC704):1(SC711) mixed ratio were amounted to be maximum (7860 and 7842 kg/ha, respectively) and with the increasing of SC711 portions, grain yield decreased.A agronomical and computational indices measured showed that 1(SC704):3(SC711) combination of hybrids with 85000 plants/ha due to obtaining of LER=1.214, 21.5% increase in relative yield total (RYT), highest competitively, least reduction in per plant yield and maximum per plant yield proved it to be the best combination. Relative competition ability (RCA) and nich differentiation index (NDI) estimates indicated that intra-competition of SC711 as compared to its inter-competitionwas higher than SC704 and 8% nich differentiation between hybrids showed that mixed-cropping system yielded more than their pure cultivation.

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APA: Copy

SADEGHZADEH HEMAYATI, S., SIADAT, SEYED ATA ELAH, SADEGHZADEH HEMAYATI, F., VALIZADEH, MOSTAFA, & FATHI, GHODRAT ELAH. (2002). EVALUATION OF TWO CORN CULTIVARS UNDER MIX-CROPPING SYSTEM USING DIFFERENT PLANT DENSITIES. THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA), 25(1), 73-88. SID. https://sid.ir/paper/24682/en

Vancouver: Copy

SADEGHZADEH HEMAYATI S., SIADAT SEYED ATA ELAH, SADEGHZADEH HEMAYATI F., VALIZADEH MOSTAFA, FATHI GHODRAT ELAH. EVALUATION OF TWO CORN CULTIVARS UNDER MIX-CROPPING SYSTEM USING DIFFERENT PLANT DENSITIES. THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA)[Internet]. 2002;25(1):73-88. Available from: https://sid.ir/paper/24682/en

IEEE: Copy

S. SADEGHZADEH HEMAYATI, SEYED ATA ELAH SIADAT, F. SADEGHZADEH HEMAYATI, MOSTAFA VALIZADEH, and GHODRAT ELAH FATHI, “EVALUATION OF TWO CORN CULTIVARS UNDER MIX-CROPPING SYSTEM USING DIFFERENT PLANT DENSITIES,” THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA), vol. 25, no. 1, pp. 73–88, 2002, [Online]. Available: https://sid.ir/paper/24682/en

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