GROWTH PATTERN OF POMEGRANATE {Punica granatum L.) SAPLINGS CV. GANESH UNDER VARYING MOISTURE LEVELS IN DIFFERENT TYPES OF SOILS
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Date
1999-07-14
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MAHATMA PHULE KRISHI VIDYAPEETH RAHURI - 413 722, DIST- AHMEDNAGAR. MAHARASHTRA STATE (INDIA)
Abstract
The present investigation was undertaken during August 1997 to February 1998 at Mahatma Phule Krishi Vidyapeeth, Rahuri, to study the growth pattern of pomegranate seedlings under different moisture levels based on IW/CPE ratio, in different soil types. The pot culture experiment was laid out in completely randomised design with twelve treatments and three replications. Two moisture regimes viz., 0.8 IW/CPE ratio (higher) and 0.6 IW/CPE ratio (lower) were maintained in six predominent soil series viz., Nimone, Otur, Sawargaon, Dholwad, Pargaon and Sibneri series. Former four soils series were 'clay' in texture and latter two series were 'sandy-loam' in texture. Nimone series was medium in available 'N' (274 ha-1), available 'P' (24.30 kg ha-1) and very high in available 'K' (675 kg ha-1) status, followed by Otur, Sawargaon and Dholwad series. Pargaon and Sibneri sereis were low in fertility. Unlike other soils, Dholwad series was found to be salt affected (pH = 8.7, EC= 4.75 dSm-1). Fertilizers were not applied to the soils to study the effect of their inherent fertility. The biometric observations like survival percentage, plant height, number of internodes, leaf number, total leaf area per plant, dry matter content and root/shoot ratio were recorded and efforts were also made to study the physiological response of pomegranate in terms of stomatal conductance. Clayey soils viz., Nimone, Otur and Sawargaon except Dholwad series proved to be better over Pargaon and Sibneri series in respect of plant growth at their respective water regimes. Water regime at 0.8 IW/CPE ratio recorded better biometric results over 0.6 IW/CPE ratio in all soils except Dholwad series. The growth attributes viz., plant height, number of internodes, leaf number, leaf area per plant and dry matter were recorded maximum in Nimone series at 0.8 IW/CPE level (101.33 cm, 223, 756.66, 5836.65 cm2 and 51.93 g, respectively), followed by Otur and Sawargaon at 0.8 IW.CPE. Pargaon and Sibneri soil series recorded significant reduction in growth attributes than those of clayey soils. In 'salt affected' Dholwad series, the detrimental effects of soil salinity on growth characters were seen. At higher water regime (0.8 IW/CPE), the aggravated hazards caused about 66.6% mortality and drastic reduction in growth attributes like number of internode, leaf number and leaf area per plant (8.52%, 5.34% and 6% of the maximum i.e. Nimone at 0.8 IW/CPE respectively). Unlike Pargaon and Sibneri soil series, in clayey soils higher root/shoot ratio was recorded at lower water regime (0.6 IW/CPE) over higher water regime (0.8 IW/CPE). Increased stomatal conductance was recorded after resumption of water over stressed plants. It was higher at moisture level of 0.8 IW/CPE and in clayey soils of Nimone, Otur and Sawargaon series. In Dholwad soil series,it was very low at 0.8 IW/CPE level.
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