Nutrient management of raya (Brassica juncea) varieties under poplar (Populus deltoides) based agroforestry system
Loading...
Date
2021
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Punjab Agricultural University, Ludhiana
Abstract
The present study entitled “Nutrient management of raya (Brassica juncea) varieties under
poplar (Populus deltoides) based agroforestry system” was conducted at research area of the
Department of Forestry & Natural Resources, Punjab Agricultural University, Ludhiana and
Regional Research Station, Bathinda during the rabi season 2019-20. The experiments were
conducted in Randomised Complete Block Design with sowing of three varieties (Giriraj,
RLC 3 and PBR 357) and six nutrient levels ; Control (no nutrients), Zinc (25 kg ha-1), 75%
of recommended dose of fertilizers (RDF), 100% RDF (N :100 kg ha-1 & P2O5 : 30 kg ha-1),
125% RDF and 150% RDF. Zn (25 kg ha-1) was also applied along with different nutrient
levels. The soil of the experimental site was loamy sand in texture, low in available N and
medium in available K at both the locations. Available P was medium at Ludhiana and high at
Bathinda; organic carbon content was medium at Ludhiana and low at Bathinda. Tree
parameters such as height (14.2 m), diameter at breast height (16.6 cm) and crown spread
(16.7 m2) was higher in 4-year-old poplar plantation at Ludhiana than 3-year-old poplar
plantation at Bathinda. Leaf area index of poplar started increasing from mid-February and
reached maximum in mid-April. The average temperature was higher in open (23.8ºC) as
compared to poplar plantation (22.1ºC) whereas relative humidity followed opposite trend of
temperature. Under poplar plantation, PAR started increasing from end-January till first
fortnight of April. Application of 150% RDF significantly increased plant height, dry matter
accumulation from 60 DAS up to maturity, secondary branches per plant, siliquae per plant,
siliqua length, seeds per siliqua, seed yield, stover yield and oil yield under poplar. PBR 357
and RLC 3 varieties recorded the highest seed yield (1293 and 1375 kg ha-1) and oil content
(42.2 and 41.9%) at Ludhiana and Bathinda, respectively. RLC 3 variety recorded higher oil
content but oil yield was significantly higher in PBR 357 due to its higher seed yield. PBR
357 variety applied with 150% RDF gave highest seed yield (1682 and 1800 kg ha-1 at
Ludhiana and Bathinda respectively) than other treatment combinations. Overall reduction in
seed yield was 17.2 and 20.4% under 3-and 4-year-old poplar plantation as compared to open
at Bathinda and Ludhiana, respectively.
Description
Keywords
Citation
Ramandeep Kaur (2021). Nutrient management of raya (Brassica juncea) varieties under poplar (Populus deltoides) based agroforestry system (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.