PHYSIOLOGICAL EVALUATION OF SUPER EARLY AND MID EARLY PIGEONPEA (Cajanus cajan (L.) Millsp) GENOTYPES FOR DELAYED KHARIF SOWING
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Date
2021-11-22
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Acharya N.G. Ranga Agricultural University, Guntur
Abstract
The present research was accomplished on “Physiological evaluation
of super early and mid-early pigeonpea (Cajanus cajan (L.) Millsp)
genotypes for delayed kharif sowing” on sandy loam soils of dryland farm
of S.V. Agricultural College, Tirupati campus of Acharya N.G. Ranga
Agricultural University during late kharif, 2019-20. The field experiment was
planked down through randomized block design with three replications. Ten
pigeonpea genotypes of two different flowering pattern viz., two super early
determinate genotypes, ICPL 20338 (V1) and ICPL 11255 (V2) matured by
108 and 107 days, respectively. Whereas super early indeterminate genotypes,
ICPL 20325 (V3), ICPL 88039 (V4) matured by 141 and 140 days. However,
mid early genotypes, AKTE 12-04 (V5), WRG 121 (V6), TRG 111 (V7),
KRG 33 (V8), WRG 93 (V9) and PRG 176 (V10) matured in 154, 150, 148,
146, 147 and 145 days, respectively. Recommended dose of 25-30 kg ha-1 N,
50 kg ha-1 P2O5 and 30 kg ha-1 K2O were applied in the form of urea, single
super phosphate and murate of potash, respectively.
The observations at 30 days interval were recorded on photothermal
units, morphological parameters, growth parameters, yield and its attributes.
Significant differences among the genotypes were observed for plant height,
number of branches, drymatter partitioning and growth parameters.
Among super early genotypes, indeterminate genotype (ICPL 88039)
recorded highest GDD (2250.3, 2452.5 oC day), PTU (27296.1, 29626.2 oC
day hour), HTU (11794.9, 12684.9 oC day hour) at initiation of flowering and
50% flowering, respectively and also recorded highest plant height
(175.72 cm), total drymatter (168.04 g plant-1), CGR (2.51 g m-2 day-1)
whereas super early indeterminate genotype ICPL 20325 recorded highest
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GDD (3691.8 oC day), PTU (48694.2 oC day hour), HTU (19359.4 oC day
hour), HUE (0.54 kg ha-1 oC-1 day-1), number of branches (26), leaf area
(857.22 cm2 plant-1), leaf area index (0.71), leaf area duration (28 days),
number of pods per plant (226), number of seeds per pod (4), hundred seed
weight (10.12 g), pod yield (5130 kg ha-1), seed yield (2000 kg ha-1), harvest
index (37.17%) but highest net assimilation rate (0.0057 g m-2 day-1) was
shown by super early determinate genotype, ICPL 11255 at harvest.
Among mid early genotypes, AKTE 12-04 accumulated highest GDD
(2553.1, 4001.7 oC day), PTU (30764.3, 52301.6 oC day hour), HTU
(13457.8, 21915.5 oC day hour) at days to flower initiation and maturity,
respectively whereas WRG 93 accumulated highest GDD (2919.7 oC day),
PTU (36058.3 oC day hour), HTU (14735.1oC day hour) at days to 50%
flowering and WRG 121 recorded highest HUE (0.53 kg ha-1 oC-1 day-1) plant
height (219.68 cm), number of branches (30), number of pods per plant (232),
number of seeds per pod (4), hundred seed weight (12.40 g), pod yield
(5569 kg ha-1), seed yield (2083 kg ha-1) and harvest index (36.44%).
Whereas, TRG 111 recorded highest total drymatter (218.66 g plant-1) leaf
area (1585.80 cm2 plant-1) crop growth rate (4.73 g m-2 day-1), leaf area index
(1.32), leaf area duration (58 days) but KRG 33 recorded highest net
assimilation rate (0.0024 g m-2 day-1) at harvest.
In the present investigation among super early genotypes evaluated,
ICPL 20325 recorded more seed yield of 2000 kg ha-1 with high HUE of
0.55 kg ha-1 oC-1 day-1 matured in 141 days followed by ICPL 88039
(1638 kg ha-1) matured in 140 days. Among mid early genotypes, WRG 121
recorded more seed yield (2083 kg ha-1) and HUE (0.53 kg ha-1 oC-1 day-1)
which matured in 150 days followed by TRG 111 (1944 kg ha-1) which
matured in 148 days. Hence, ICPL 20325, ICPL 88039, which matured earlier
than WRG 121 and TRG 111; also accumulated more dry matter from 50%
flowering to maturity were best suitable under delayed kharif conditions for
Southern zone of Andhra Pradesh.
Description
PHYSIOLOGICAL EVALUATION OF SUPER
EARLY AND MID EARLY PIGEONPEA
(Cajanus cajan (L.) Millsp) GENOTYPES FOR
DELAYED KHARIF SOWING