RESPONSE OF NON-GM COTTON ADVANCE LINES TO VARYING LEVELS OF N UNDER RAINFED ORGANIC CULTIVATION IN VIDARBHA REGION OF INDIA.
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Date
2022-12-06
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Dr. Panjabrao Deshmukh Krishi Vidyapeeth Akola, Maharashtra
Abstract
The present investigation entitled “Response of non-GM cotton advance lines to varying levels of N under rainfed organic cultivation In Vidarbha Region of India” was conducted at Research Farm Centre for Organic Agriculture Research and Training (COART), Department of Agronomy and Department of SSAC, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola during Kharif 2021-22.
The experiment was laid out in FRBD with eight treatments, each replicated thrice. Vermicompost, an organic manure is used as a source of nutrient. The soils of the experimental field has swell-shrink property, classified under Vertisol order. The clay loam texture soil was low in available nitrogen and phosphorus content, whereas, sufficiently high in potassium content.
After organic cotton experimentation, significantly highest reduction in bulk density of soil (1.24 Mg m-3), higher improvement in water holding capacity (58.22 %) and highest (5.67 g kg-1) organic carbon content was recorded in the treatment T4 where 60 kg N ha-1 was supplied through vermicompost to Hirsutum cultivar (Chetna J1). Lowest value of pH (7.57) and EC (0.25 ds m-1) were registered in treatment T2 where 60 kg N ha-1 was supplied through vermicompost to Arboreum cultivar (AVC 14). Significantly highest available nitrogen (228 kg ha-1), available phosphorus (23.19 kg ha-1) and available potassium (351 kg ha-1) were recorded in the treatment T2 where 60 kg N ha-1 was given through vermicompost to Arboreum cultivar (AVC 14). Highest value of DTPA extractable micronutrients like Fe, Cu, Mn, Zn were registered with treatment T2 where 60kg N ha-1 was applied through vermicompost to Arboreum cultivar (AVC 14). Significantly highest uptake of N (69.71 kg ha-1), P (15.6 kg ha-1) and K (66.28 kg ha-1) was recorded in the treatment T4 supplied with 60 kg N ha-1 by vermicompost to Hirsutum cultivar (Chetna J1). T4 treatment with an application of vermicompost @60 kg N ha-1 to Hirsutum cultivar (Chetna J1) recorded significantly higher seed cotton (1508 kg ha-1) and stalk yield (3770 kg ha-1). Growth parameters like plant height, number of sympodia, number of bolls per plant were highest in T4 treatment supplemented with 60 kg N ha-1 by vermicompost to Hirsutum cultivar (Chetna J1). Highest crop stand (114) is observed in with treatment T2 where 60 kg N ha-1 was applied through vermicompost to Arboreum cultivar (AVC 14). Ginning percentage and lint index were highest in treatment T4 supplemented with 60 kg N ha-1 by vermicompost to Hirsutum cultivar (Chetna J1). The highest staple length was registered with T4 treatment where 60 kg N ha-1 supplied to Hirsutum cultivar (Chetna J1). Treatment T1 and T2 recorded highest micronaire value (0.88x 10-6 g inch-1) in Arboreum cultivar (AVC 14). Highest fibre strength (32.17g tex-1) and uniformity ratio (84%) was registered in T7 supported with 40kg N ha-1 Hirsutum cultivar (GHV 8023), it is at par with treatment T4 supplimented with 60kg N ha-1 to Hirsutum cultivar (Chetna J1). An application of vermicompost @60 kg N ha-1 to Hirsutum cultivar (Chetna J1) showed highest B:C ratio.
Thus it can be concluded that, application of vermicompost as a source of organic manure significantly improves the physical properties, chemical properties, growth parameters, fibre quality parameters and yield performance of cotton. Hence an application of 60 kg N ha-1 through vermicompost to Non GM cultivars of cotton found to be beneficial for organically grown cotton under rainfed agricultural system.
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CHINTHALA MOUNIKA (2022). Response of non-GM cotton advance lines to varying levels of N under rainfed organic cultivation In Vidarbha Region of India. Department of Soil Science and Agricultural Chemistry, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. Print. xv, 119p. (Unpublished).