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PHOSPHORUS MANAGEMENT IN KHARIF RICE-AUTUMN SUGARCANE RAISE WITH OR WITHOUT INTERCROP OF GREENGRAM VAR. CO-4.

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Title PHOSPHORUS MANAGEMENT IN KHARIF RICE-AUTUMN SUGARCANE RAISE WITH OR WITHOUT INTERCROP OF GREENGRAM VAR. CO-4.
 
Creator PATEL, VINAYKUMAR M.
 
Contributor PATEL, C.L.
 
Subject ---
 
Description Field experiments were conducted during 2004-05 and
2005-06 at Regional Sugarcane Research Station Farm, Navsari
Agricultural University, Navsari to study the “Phosphorus
management in kharif rice-autumn sugarcane raise with or without
intercrop of greengram Cv. Co. 4.”
The soil of the experimental plot was clay in texture,
medium in organic carbon and available phosphorus, low in available
nitrogen, moderately high in available potassium and slightly alkaline
in reaction.
The experiment on phosphorus management in preceding
kharif rice crop was laid out in randomized block design with four
treatments consisting two levels of pressmud biocompost (20 and 40
t/ha) and one level of inorganic phosphorus (13.2 kg P/ha) along with
control (No phosphorus) replicated four times. The experiment on
autumn sugarcane was superimposed on the same site without
changing the randomization of treatments during both the years.
Keeping kharif rice treatments as a main plots and three phosphorus
levels applied to sugarcane raise with and without intercrop of
greengram Cv. Co. 4 (Zero kg P/ha without (S1) and with (S2)
intercrop, 50 per cent recommended dose of P/ha without (S3) and with
(S4) intercrop and 100 per cent recommended dose of P/ha (i.e. 125 kg
P2O5/ha) without (S5) and with (S6) intercrop as sub-plots, with total
twenty four treatment combinations in split plot design.
The highest grain yield (53.26 q/ha pooled data) of kharif
rice was recorded with 40 tonnes pressmud biocompost/ha, being at
par with 20 tonnes pressmud biocompost/ha and 13.2 kg P/ha,
inorganic. The per cent increase recorded with these treatments
(chronological) over control (no phosphorus) were 13.62, 11.03 and
7.92 in pooled data, respectively. The increased in grain yield of
kharif rice with these treatments was the results of increased growth
and yield attributes viz., number of tillers hill–1, number of effective
tillers hill–1, number of panicle–2 and number of filled grain panicle m–
2. The phosphorus content in grain and straw as well as phosphorus
uptake by grain, straw and their total were increased significantly with
application of pressmud biocompost over control. Further, the
available phosphorus content of soil after harvest of rice increased
significantly with pressmud biocompost application. The net
realization and benefit : cost ratio were higher with application of
inorganic phosphorus (13.2 kg P/ha), may be due to higher amount and
price of pressmud biocompost.
Among the phosphorus management treatments,
application of 40 tonnes pressmud biocompost/ha to preceding kharif
rice crop increased the millable cane yield and sugarcane equivalent
yield of succeeding sugarcane. The millable cane yield/sugarcane
equivalent yield on pooled basis were increased to the tune of
19.86/19.91, 12.25/12.41 and 5.92/6.40 per cent under T3, T2 and T4,
respectively over T1. The quality parameters viz., fibre (%),
commercial cane sugar (%) and commercial cane sugar yield (t/ha)
were improved with pressmud biocompost applied to preceding rice.
Weed population, dry weight of weeds and nutrient content (N, K and
S) in different parts of sugarcane did not differ significantly due to
different phosphorus management treatments applied to preceding rice
crop. However, both the levels of pressmud biocompost (20 and 40
t/ha) applied to rice were increased the total uptake of nutrients (N, P,
K and S) by sugarcane as well as improved the nutrient status of soil
after harvest of sugarcane crop. While, net realization and benefit :
cost ratio from succeeding sugarcane raise with or without intercrop of
greengram were significantly increased with application of 40 tonnes
pressmud biocompost/ha to preceding kharif rice crop.
The yield attributes of sugarcane i.e. number of millable
canes per metre row length and per hectare as well as single millable
cane weight were improved significantly with phosphorus application.
Thus, application of 100 per cent recommended dose of phosphorus to
sugarcane raised without intercrop of greengram Cv. Co. 4 (S5)
resulted in significantly higher millable cane yield and commercial
cane sugar yield (t/ha) and it was at par with 100 per cent
recommended dose of phosphorus to sugarcane raise with intercrop
(S6) for sugarcane equivalent yield, net realization and benefit : cost
ratio of sugarcane. The application of 100 per cent recommended dose
of P/ha to sugarcane raise with intercrop noted the higher phosphorus
content in leaf blade, leaf sheath and stalk as well as potassium and
sulphur content in sugarcane stalk. There was a significant increase in
total nutrient (N. P, K and S) uptake by sugarcane and significant
improvement in N and P content of soil after harvest of sugarcane with
application of 100 per cent recommended dose of P/ha to sugarcane
raise with (S6) or without (S5) intercrop of greengram Cv. Co. 4.
The balance of soil available N, P and K after each year of
rice-sugarcane cropping system was positive under application of
pressmud biocompost to preceding rice and it was higher with
application of 40 tonnes pressmud biocompost/ha followed by 20
tonnes pressmud biocompost/ha.
The available soil N and P balance after each year of ricesugarcane
cropping system was positive with application of
phosphorus to sugarcane raise with or without intercrop of
greengram, and it was increased with increased levels of phosphorus
(upto100 per cent recommended dose of P/ha). The soil available K
balance showed a positive balance for all treatments but higher value
was observed with zero kg P/ha without intercrop (S1).
The net realization from rice-sugarcane cropping system
was increased significantly with 40 tonnes pressmud biocompost/ha
but it was at par with 20 tonnes pressmud biocompost/ha.
The net realization and B : C ratio from rice-sugarcane
cropping system were increased significantly with application of 100
per cent recommended dose of P/ha to sugarcane raise with (S6) or
without (S5) intercrop of greengram Cv. Co. 4.
Thus, it can be concluded that to achieve higher economic
returns from kharif rice-autumn sugarcane cropping system as well as
to sustain the soil fertility, apply 20 tonnes pressmud biocompost/ha
to kharif rice and recommended dose of phosphorus (125 kg P2O5/ha)
to sugarcane raise with or without intercrop of greengram Cv. Co. 4
under South Gujarat condition.
 
Date 2016-03-09T10:50:35Z
2016-03-09T10:50:35Z
2008-10
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/64984
 
Language en
 
Format application/pdf
 
Publisher Navsari Agricultural University, Navsari