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PHOSPHORUS AND SULPHUR MANAGEMENT IN SAFFLOWER (Carthamus tinctorius L.)”

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Title PHOSPHORUS AND SULPHUR MANAGEMENT IN SAFFLOWER (Carthamus tinctorius L.)”
 
Creator KRISHNA GOKHLE, V.G
 
Contributor PULLA RAO, CH
 
Subject PHOSPHORUS, SULPHUR, MANAGEMENT, SAFFLOWER
 
Description A field experiment entitled “Phosphorus and sulphur management in
safflower (Carthamus tinctorius L.)” was conducted on clay loam soil of the
Agricultural College Farm, Bapatla campus of Acharya N. G. Ranga
Agricultural University during rabi, 2003-04 to study the response of safflower
(Carthamus tinctorius L.) to levels of phosphorus and sulphur. The treatments
comprised of three levels each of phosphorus (0, 30 kg and 60 kg P2O5 ha-1)
and sulphur (0, 20 kg and 40 kg S ha-1).
The results of the investigation revealed that among the growth
parameters, the highest drymatter production at 30 DAS was noticed with 60
kg P2O5 ha-1 and 40 kg S ha-1. Remaining growth stages i.e., at 60, 90 DAS
and at harvest, the highest drymatter production was recorded by the
application of 30 kg P2O5 ha-1 and 20 kg S ha-1.
Among the yield attributes, number of seeds per capsule was
significantly influenced by phosphorus and sulphur levels. Whereas, the test
weight was significantly influenced by phosphorus application only.
Application of phosphorus @ 30 kg P2O5 ha-1 and 20 kg S ha-1 recorded
maximum values of all the yield attributes studied. However, the interaction
effect of P and S did not show any significant effect on any of the yield
attributes studied.
Seed and stalk yields of safflower were significantly influenced by
phosphorus and sulphur levels only, but not their combinations. The highest
seed and stalk yields were recorded with 30 kg P2O5 ha-1 and 20 kg S ha-1
Higher doses of P and S showed a declining trend in seed and stalk yield.
Though the highest oil content was recorded upto 60 kg P2O5 ha-1 and
20 kg S ha-1, the interaction effect of P and S on oil content was highest at 30
kg P2O5 ha-1 and 20 kg S ha-1 application only. The highest oil yield was
recorded with 60 kg P2O5 ha-1 and 20 kg S ha-1 application. But the interaction
of P and S did not show any significant influence on oil yield.
The highest uptake of phosphorus by seed was recorded with 30 kg
P2O5 ha-1 and 20 kg S ha-1. While, phosphorus uptake by stalk was recorded
with 60 kg P2O5 ha-1. However, the highest total uptake by seed and straw
was recorded by 30 kg P2O5 ha-1 and 20 kg S ha-1. Sulphur uptake also
followed a similar trend as that of seed, stalk and total uptake of phosphorus.
Among the phosphorus levels, maximum benefit cost ratio was
obtained with 30 kg P2O5 ha-1 and among the sulphur levels, 20 kg S ha-1
recorded a maximum benefit cost ratio followed by 40 kg S ha-1. Among the P
and S combinations 30 kg P2O5 ha-1 and 20 kg S ha-1 recorded the highest
benefit cost ratio of 4.08 and the net return per rupee invested (1.67).
Economic optimum levels for phosphorus and sulphur found in this
experiment were 40.2 kg P2O5 ha-1 and 26.8 kg ha-1, respectively.
Overall, the result of the study indicated that application of 30 kg P2O5
ha-1 and 20 kg S ha-1, realised the maximum seed and stalk yield of safflower.
The highest oil content and oil yield were obtained with 60 kg P2O5 ha-1 and
20 kg S ha-1. However, the application of 30 kg P2O5 ha-1 and 20 kg S ha-1
combination recorded the highest oil content, benefit cost ratio and return per
rupee invested by safflower. The theoretical economic optimum levels of P
and S were obtained at 40.2 kg and 26.8 kg S ha-1. Hence, the present study
indicated the necessity of application of phosphorus and sulphur for
enhancing the productivity of safflower on clay loam soil.
 
Date 2016-08-31T10:37:18Z
2016-08-31T10:37:18Z
2004
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/74590
 
Language en
 
Relation D7593;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD