EFFECT OF ORGANIC AND INORGANIC SOURCES OF NUTRIENTS ON SORGHUM SUDAN GRASS HYBRID - OAT CROPPING SYSTEM
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Date
2019-09
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CSKHPKV. Palampur
Abstract
A field experiment entitled “Effect of organic and inorganic sources of nutrients on sorghum
sudan grass hybrid-oat cropping system” was conducted at Research Farm of Department of
Agronomy, Forages and Grassland Management, CSK, Himachal Pradesh Krishi
Vishvavidyalaya, Palampur from Kharif 2017 to Rabi 2018-19. Soil of the experimental site
was silty clay loam in texture, acidic in reaction, medium in organic carbon, available
phosphorus and available potassium and low in available nitrogen. The experiment was laid out
in a Randomized Block Design with two factors and replicated thrice. The treatments consisted
of four levels of FYM and biofertilizers viz. control, FYM @10 t ha-1
, Azotobacter+ PSB and
FYM @10 t ha-1 + Azotobacter + PSB and four levels of fertilizers viz. no fertilizer, 50, 75 and
100 per cent of recommended fertilizer. Significantly highest plant height, shoots per square
meter and dry matter accumulation of sorghum sudan grass hybrid and oat was observed with
application of FYM @10 t ha-1 + Azotobacter + PSB than rest of the organic treatments, though
this treatment was at par with FYM @10 t ha-1
for leaf stem ratio. Similarly, plant height,
shoots per square meter and dry matter accumulation increased with increasing fertilizer levels
with highest values recorded with application of 100 per cent of recommended fertilizer though
the increase in leaf stem ratio was significant only up to 75 per cent of recommended fertilizer.
Significantly highest total green fodder, dry fodder, crude protein, acid detergent fibre and
neutral detergent fibre yields and net returns were recorded with the application FYM @10 t ha1 + Azotobacter+ PSB as well as 100 per cent of recommended fertilizer. Application of FYM
@10 t ha-1 + Azotobacter+ PSB resulted in higher benefit cost ratio, while, significantly highest
benefit cost ratio was recorded with 100 per cent of recommended fertilizer. Crude protein
content was significantly higher with application of FYM @10 t ha-1 + Azotobacter+ PSB as
well as 100 per cent recommended fertilizer. However, the effect of FYM @10 t ha-1 +
Azotobacter+ PSB and FYM @10 t ha-1 was same and resulted in significantly minimum
content of acid detergent fibre and neutral detergent fibre. The effect of 75 and 100 per cent of
recommended fertilizer was also same and resulted in significantly minimum acid detergent
fibre and neutral detergent fibre content.An increase in soil organic carbon, biomass carbon and
available NPK was observed with the application of FYM @10 t ha-1+Azotobacter + PSB as
well as 100 per cent recommended fertilizer application over the initial status at the end of
experiment