Abstract
An attempt was initiated during two consecutive kharifs of 2009 and 2010 at Agronomy Farm of Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir to ascertain the impact of nitrogen (N), sulphur (S) and farmyard manure (FYM) which was taken from farm animals (Bovine) on developmental dynamics and yield of sunflower. Application of N at 80 and 120 kg ha-1 at par, significantly increased periodic growth parameters and yield over 40 kg N ha-1. S at 60 kg ha-1 showed yield advantage over 30 kg S ha-1. Seed yield with 10 and 20 t FYM ha-1 was significantly higher over the control. Availability of N was highest with treatment combination of 120 kg N + 60 kg S + 20 t FYM ha-1. Similarity was observed for available S. Therefore, for sustainably higher yield of sunflower, the nutrient management must centre around 120 kg N + 60 kg S ha-1 with 20 t FYM ha-1. Key words: Seed yield, farmyard manure (FYM), nitrogen (N), oil content, sulphur (S), sunflower.
Highlights
Sunflower (Helianthus annuus L.) the most important oilseed crops of the world because of the adequate concentration of unsaturated fatty acids (900 g kg-1) in its oil (Burton et al, 2004) and occupies second place next to soybean as a source of vegetable edible oil
The sterility percentage in relation to achene development increased significantly with each added increment of N. This could be attributed to higher number of achenes capitulum-1 at higher nitrogen levels thereby resulting in increased competition for photosynthates to translocate in the economic part
The data indicate that pooled seed yield enhanced by 21.21%with dose of 120 kg N ha1 over 40 kg N ha-1
Summary
Sunflower (Helianthus annuus L.) the most important oilseed crops of the world because of the adequate concentration of unsaturated fatty acids (900 g kg-1) in its oil (Burton et al, 2004) and occupies second place next to soybean as a source of vegetable edible oil. Sunflower has gained popularity of all the oilseed crops, because of its excellent quality oil due to its richness with high degree polyunsaturated fatty acids, anticholesterol properties, short duration, wide adaptability to soil and climatic conditions, photo and thermo-insensitiveness, drought tolerance and higher oil yield per unit area (Thimmegowda et al, 2007). For higher productivity and sustainability, integrated use of organic and inorganic sources of nutrients is very important. The present investigation was carried out to study the effect of N, S and FYM application on growth and yield of sunflower under temperate conditions
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