Vol. 7 (6) : November-December 2016 issue
Green Farming Vol. 7 (6) : 1372-1376 ; November-December, 2016
Effect of male & female parent’s row ratio and fertility levels on the growth and hybrid seed production of maize
ANKUSH KUMARa1*, B.S. MANKOTIAa2, MUNISH SHARMAb3 and NAVNEET JARYALb4
aDepartment of Agronomy, Forages and Grassland Management, bDepartment of Soil Science, C.S.K. Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176 062 (Himachal Pradesh)
Designation : 1,2,3Ph.D. Scholar *(ankushhpkv@gmail.com), 2Principal Scientist
Subject : Agronomy and Crop Production
Paper No. : P-4763
Total Pages : 5
Received : 29 January 2016
Revised accepted : 14 October 2016
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Citation :
ANKUSH KUMAR, B.S. MANKOTIA, MUNISH SHARMA and NAVNEET JARYAL. 2016. Effect of male & female parent’s row ratio and fertility levels on the growth and hybrid seed production of maize. Green Farming Vol. 7 (6) : 1372-1376 ; November-December, 2016
ABSTRACT
A field experiment was conducted at Shivalik Agricultural Research and Extension Centre Kangra, to study the effect of row ratio of male (HKI 163) and female (HKI 193-1) parents and fertility levels on the growth, development and hybrid seed production of maize (Zea mays L.) The experiment was laid out in split plot design with three replications, constituting twelve treatment combinations involving two factors viz., three row ratios (3:1, 4:1 and 5:1 of female: male) and four fertility levels (80-40-25, 120-60-40, 160-80-55 and 200-100-70 kg N, P2O5 and K2O ha-1). Emergence percentage was same upto 160-80-55 kg N-P2O5-K2O ha-1 but significantly higher over that in 200-100-70 kg N-P2O5-K2O ha-1 in both the parents. Application of 200-100-70 kg N-P2O5-K2O ha-1 being at par with 160-80-55 kg N-P2O5-K2O ha-1 at 60 and 90 DAS (days after sowing) recorded significantly taller plants in male parent and higher height of cob placement in both male and female parents. Fertility level 120-60-40 kg N-P2O5-K2O ha-1 being at par with 160-80-55 kg N-P2O5-K2O ha-1 recorded significantly higher number of leaves plant-1 as compared to other fertility levels in case of female parent. Increase in fertility level delayed tasseling and silking and recorded higher values of disease incidence (stalk rot), lodging and vice versa for barrenness. Application of 120-60-40 kg N-P2O5-K2O ha-1 being at par with 160-80-55 kg N-P2O5-K2O ha-1 recorded significantly higher seed/grain yield in both the parents. Row ratios failed to influence different phenological and morphological characters except lodging (%) in male parent line and seed/grain yield in both parents. Due to low percentage of barren, lodged and diseased plants, row ratio 3:1 resulted in significantly higher seed/grain yields in female/male parents. Interaction effect of fertility levels and row ratios was significant. Application of 120-60-40 kg N-P2O5-K2O ha-1 in 3:1 (female: male) ratio recorded significantly high hybrid seed yield (22.2 q ha-1) and higher stover yield (56.0 q ha-1) at 5:1 (female: male) row ratio.
Key words :
Fertility level, Growth & yield attributes, Hybrid seed production, Male: Female ratio, Maize crop, Plant height.
