STUDIES ON CONJOINT APPLICATION OF ORGANIC AND INORGANIC SOURCES OF NUTRIENTS IN PEA
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Date
2015
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ABSTRACT
The present investigation entitled “Studies on conjoint application of organic and
inorganic sources of nutrients in pea” was conducted during 2010-11 in the Vegetable Research
Farm of the Department of Vegetable Science, Dr Y S Parmar University of Horticulture and
Forestry, Nauni, Solan (HP). The experiment was laid out in a complete randomized block design
with three replications comprising nine treatments viz. T1 : Recommended dose of NPK (25:60:60
kg/ha); T2 : Rhizobium isolate-1 +75 % N + 100 % P & K; T3 : Rhizobium isolate-2 +75 % N +
100 % P & K; T4 : Rhizobium isolate-1 +50 % N + 100 % P & K; T5 : Rhizobium isolate-2 +50 %
N + 100 % P & K; T6 : Rhizobium isolate-1 + PSB + 75 % N & P + 100 % K; T7 : Rhizobium
isolate-2 + PSB + 75 % N & P + 100 % K; T8 : Rhizobium isolate-1 + PSB + 50 % N & P + 100
% K; T9 : Rhizobium isolate-2 + PSB + 50 % N & P+ 100 % K. Seeds were sown in lines at a
spacing of 60 × 7.5 cm in 3.0 m × 2.5 m plots. The observations were recorded on plant height
(cm), days taken to first flowering (days), days taken to first picking (days), harvest duration
(days), Pod length (cm), pod girth (mm), number of pods per plant, number of seeds per pod, pod
yield (kg/plot and q/ha), shelling percentage (%), TSS (°B), shelf life (days), disease incidence
and severity (Fusarium wilt and powdery mildew, respectively), soil pH, EC (dSm-1), organic
carbon, available NPK content of soil before start and after completion of experiment and nutrient
content (NPK) in the leaves . The results revealed that treatment T9 : Rhizobium isolate-2 + PSB
+ 50 % N & P+ 100 % K was rated as the best treatment for majority of characters like plant
height (cm), days taken to first flowering (days) days taken to first picking (days), harvest
duration (days), Pod length (cm), pod girth (mm), number of pods per plant, number of seeds per
pod, pod yield (kg/plot and q/ha), shelling percentage (%), shelf life (days), minimum disease
incidence and severity (Fusarium wilt and powdery mildew, respectively), available N content in
the soil and nutrient content (N) in the leaves. However, this treatment was found statistically at
par with treatment T7 (Rhizobium isolate -2 + PSB + 75 % N & P + 100 % K), which was the next
best treatment for most of the characters under study. Gross income (Rs. 2, 42, 670 /ha), net
income (Rs. 1, 79, 095 /ha) and B: C ratio (2.81:1) was also maximum in T9. Therefore, on the
basis of present study it is concluded that application of biofertilizers (Rhizobium and PSB) in
combination with inorganic fertilizers at reduced doses (25-50 %) can be suggested as cost
effective combination for getting higher yields and quality produce.