Effect of growth regulators and chemicals on germination and growth of ranpur lime seedlings under nursery condition
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Date
2017-09-04
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Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani
Abstract
The present investigation entitled “Effect of Growth regulators and chemicals on germination and growth of Rangpur lime seedlings under nursery condition.” The study was conducted at Institutional nursery, Sweet Orange Research Station, Badnapur, College of Agriculture, Badnapur, Dist. Jalna during the year 2016-2017.The experiment was laid out in Randomized Block Design with thirteen treatments replicated thrice, comprising three treatments of GA3 concentrations i.e. (50, 100 and 150 ppm), three treatments of NAA concentrations i.e. (50, 100 and 150 ppm), three treatments of KNO3 concentrations i.e. ( 0.5, 1.0 and 2.0 %), three treatments of Thiourea concentrations i.e. (1.0 , 1.5 and 2 %) and control (Distilled water).
The observations on seed germination (viz percentage of seed germination, physical parameters of growth ( viz. height of plant, number of leaves per plant,
number of branches per plant, circumference of stem, fresh and dry weight of shoot) and root growth (viz. length of tap root, fresh and dry weight of roots,number of secondary roots, number of fibrous roots) were recorded.
The results of the investigation revealed that, there were significant variations in germination and seedling growth of Rangpur lime due to growth regulators and chemicals. Amongst the effect of growth regulators and chemicals , the seed soaked in GA3 150 ppm solution for 12 hours prior to sowing resulted in maximum germination percentage (91.33 %). The maximum height (52.12 cm), maximum number of leaves (46.59), maximum fresh weight (31.35 g) and dry weight of shoots (16.40 g) was also recorded under the treatment T3 i.e. GA3 150 ppm at 270 DAS. The maximum number of branches (6..66) was recorded under the treatment T12 i.e. Thiourea 2% at 270 DAS.
Maximum circumference of stem (22.23 mm), maximum length of tap root (49.65 cm), significantly more fresh weight of roots (14.56 g), and dry weight of roots (9.69 g), maximum secondary roots (14.71) and maximum fibrous roots (194.49) was recorded under the treatment T6 i.e. NAA 150 ppm at 270 DAS and survival percentage of seedling (80.00%) was recorded under the treatment T3 i.e. GA3 150 ppm at 270 DAS.
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