TY  - BOOK
AU  - Deepa S
AU  - Balachandran Nair G K (Guide)
TI  - Integrated Nutrient Management In A Rice-Rice Cropping System
U1  - 630 
PY  - 1998///
CY  - Vellayani
PB  - Department of Agronomy, College of Agriculture 
N2  - An experiment entitled "Integrated nutrient management in a rice- 
rice cropping system" was condcuted at Cropping Systems Research 
Centre, Karamana during the second crop season of 1995-96, to study the 
effect of long term application of manures and fertilizers on the availability 
and uptake of nutrients and changes in the physico-chemical properties of 
the soil for sustained productivity. 
The experiment was laid out in randomized block design with 
twelve sets of treatments and four replications. The twelve sets of 
treatments incldued four treatments of different levels of recommended 
fertilizers, treatments of integration of chemical fertilizers with organic 
sources like farm yard manure, crop residues (rice straw) and green 
manure, along with one each of unfertilized control and farmers practice 
of manuring. 
Organic manure addition in different forms was found to have 
pronounced effect on various growth and yield attributing characters of 
rice when applied in combination with chemical fertilizers. When compared 
to other treatments, application of 25 or 50 per cent of recommended N 
through farm yard manure in kharif followed by 75 or 100 per cent of 
 
	
recommended NPK through chemical fertilizers in rabi, gave higher tiller 
number, root production, productive tiller number, thousand grain weight, 
grain yield, and straw yield. 
Integration of organic manures with inorganic fertilizers improved 
the N, P and K uptake by the plant at all growth stages and at 
harvest. Highest Nand K uptake were recorded when 50 per cent N, 
supplied through farm yard manure in kharif season. Highest P uptake 
was recorded when 25 per cent of N supplied through crop residue in 
kharif. 
In general the available N,P,K and organic carbon contents of the 
soil were slightly improved due to combined application of organic and 
inorganic sources of fertilizers. Application of farm yard manure to meet 
50 per cent of N along with 100 per cent recommended dose of fertilizers 
recorded maximum available NPK and organic carbon 
Bulk density was lowest under treatment receiving 50 per cent 
recommended N through farm yard manure in kharif. Incorporation of 
paddy straw, to meet 25 per cent N along with chemical fertilizers enhanced 
 
water holding capacity and cation exchange capacity of the soil.

UR  - https://krishikosh.egranth.ac.in/handle/1/5810150667
UR  - https://krishikosh.egranth.ac.in/displaybitstream?handle=1/5810150667&fileid=e4f5ff15-2615-460d-a19e-3e3960fb9465
ER  -