Turkish Journal of Field Crops

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EFFECTS OF VARIABLE NITROGEN SOURCE AND RATE ON LEAF AREA INDEX AND TOTAL DRY MATTER ACCUMULATION IN MAIZE (Zea mays L.) GENOTYPES UNDER CALCAREOUS SOILS

AMANULLAH, Shahen SHAH, Zahir SHAH, Shad Khan KHALAIL, Amanullah JAN, Muhammad Tariq JAN, Muhammad AFZAL, Habib AKBAR, Hamayoon KHAN, Hidayat-ur-RAHMAN, Khalid NAWAB, FARHATULLAH, Fida MUHAMMAD, Zahid HUSSAIN, Khair Muhammad

Abstract

Leaf area index (LAI) and total dry matter are important growth and yield-determining factors in maize (Zea mays L.). Field experiment was conducted to investigate the impact of different N-fertilizer sources [urea, calcium ammonium nitrate (CAN) and ammonium sulphate (AS)] and rates (50, 100, 150 and 200 kg ha-1 ) on mean single leaf area (MSLA), number of leaves plant-1 (NLPP), LAI and total dry matter (TDM) of maize genotypes “Local cultivars (Azam and Jalal) vs. hybrid (Pioneer-3025)”. The experiment was conducted at the Agriculture Research Farm of The University of Agriculture Peshawar during summer 2008-10. The results indicated that all the experimental plots treated with N produced higher MSLA, NLPP, LAI and TDM than control (N not applied). The MSLA, NLPP, LAI and TDM increased with higher N rates (150 and 200 kg N ha[1]1 ). Application of CAN and AS produced higher MSLA, NLPP, LAI and TDM than urea in the 1 st year, but no significant differences were observed in the 2 nd year. The hybrid (P-3025) produced higher MSLA, NLPP, LAI and TDM than Azam and Jalal. The increase in MSLA and NLPP showed positive relationship with LAI. The TDM increased with increase in LAI. Application of N either as CAN or AS at the rate of 200 kg ha-1 was recommended for the high yielding hybrid maize but 150 kg N ha-1 was most suitable for the low yielding local cultivars in the study area.

Keyword: maize, Zea mays L., genotypes, N levels, N source, leaf area index, total dry matter ,
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Effects of Different Water Stress Levels on Biomass Yield and Agronomic Traits of Switchgrass (Panicum virgatum L.) Varieties under Semi-Arid Conditio

Erdal GONULAL, Suleyman SOYLU, Mehmet SAHIN

Abstract

A field experiment was conducted in the Wielkopolska region at the Gorzyń Research Station, Poland (52.34°N, 15.54°E) in Central Europe. The study was conducted over a 3-year period (2017, 2018, 2019) as a two-factorial design with four replications in the RCBD. The aim of the research was to determine the effect of the cultivar (‘Bolero’, ‘Tytan’) and the inoculation (Nitragina–seeds inoculation, Nitroflora I–seeds inoculation, Nitroflora II–soil inoculation, HiStick® Lupin–seeds inoculation) on plant development, seeds chemical composition and yielding of narrow-leaved lupin. The weather conditions and experimental factors significantly influenced on productivity of narrow-leaved lupin ‘Tytan’. Drought during the growing season reduced seeds and protein yields. After inoculation of HiStck the seeds yield was significantly greater by 12.4% (p < 0.01) and the protein yield after application of Nitroflora I or HiStick by 13.9% (p < 0.01) and 19.2% (p < 0.01), respectively. Correlation coefficients showed strong relations between number of pods and seeds per plant in both cultivars regardless of the inoculation variant, however the strongest relations in both cultivar were proved on HiStick treatment.
Keyword: Biological nitrogen fixation, chemical composition, legumes, protein efficiency, yielding
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