STUDIES ON THE EFFECT OF NITROGEN AND SULPHUR ON NUTRIENT UPTAKE. YIELD AND OIL CONTENT Of SAFFLOWER (Carthamus tinctorius L. Var. Manjira)
Loading...
Files
Date
1991
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
ANDHRA PRADESH AGRICULTURAL UNIVERSITY HYDERABAD
Abstract
A field experiment was conducted during rabi
1990-91 at Student's Farm, College of Agriculture,
Rajendranagar, Hyderabad on sandy loam soil with
safflower (Cartharnus tinctorius . L.) crop (var.
Manjira) to study the effect of nitrogen and sulphur on
seed yield, oil content and nutrient uptake. The
growth parameters, yield attributing characters,
protein content and changes in soil fertility, were
also studied. The experiment was laid out in a
randomised block design with three replications and
sixteen treatment com£inations having four levels (0,
25, 50 and 75 kg ha ) of nitrogen and sulphur each .
The experimental soil was low in N and S and nearly
neutral in reaction. The results of the study
indicated that the increased levels of nitrogen and
sulphur significantly .increased the plant height, dry
matter production, yield attributes, seed and stalk
yields, . protein content, uptake of N, P, Kand S. The
oil content was decreased with N and increased with S
application. The nutrient depletion was also increased
in soil with levels of N ands. _1The combined application
of 75 kg N and 50 kg Sha gave significantly
the highest plant height, dry matter production,
protein content, seed and stalk yields. The highest
oil content was recorded at the combined level of O kg
N and 75 kg S ha-1 • The maximum rate of uptake of N,
P, K and S was found between 60 and 90 DAS.
Significantly the highest uptake of N and S was
re~£rded with combined application of_f5 kg N + 50 kg s
ha and 50 kg N + 75 kg s ha , respectively.
Significantly the lowest values for all the parameters,
were obtained in control. The interaction of N and S
had significant effect on dry matter accumulation, N
and K uptake, but not on seed yield. There was
significant effect of N and Son depletion of N, P, K
and S during the cropping season.
From the experimental results, the highest
seed yield was obtained w;1h the combined application
of 75 kg N and 50 kg s ha • But from the response
curve drawn from predicted seed yields, the linear
response was obtained for nitrogen revealing that for
further enhancement of seed yield the level of nitrogen
can b~1increased to an economic optimum level of 126.5
kg ha • _1The economic optimum level for sulphur is
55 . 2 kg ha •
Description
Keywords
null