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Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur

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Subject: Soil Science and Agricultural Chemistry × Author: Baretha, Dinesh × Start date: 2012 × Type: Thesis ×
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    ThesisItemOpen Access
    Effect of soil test based nutrients application on phosphorus content and yield of soybean and phosphorus fractions in soil
    (JNKVV, 2014) Baretha, Dinesh; Rai, Hitendra K.
    ABSTRACT The present investigation is a part of on -going programme under AICRP on STCR. The investigation entitled “Effect of soil test based nutrients application on phosphorus content and yield of soybean and phosphorus fractions in soil” was carried out during Kharif season 2013 taking soybean (var. JS-97-52) as test crop with the following objectives: 1. To study the effect of soil test based nutrient application on growth and yield of soybean. 2. To study the effect of soil test based nutrient application on phosphorus content and uptake by soybean. 3. To study the of soil test based nutrient application on different fraction in soil The experiment was undertaken on Typic Haplustarts soil on the Research Farm of Department of Soil Science and Agricultural Chemistry, JNKVV, Jabalpur situated at 230 13’ N latitude, 790 57’ E longitude and at altitude of 393.0 meter above mean sea level). Five treatments [T1: control, T2 : GRD (20.60.20), T3 = targeted yield of 2.5 t ha-1 (0:27.9:23.4), T4 = targeted yield of 3.0 t ha-1 (25:53.9: 42.9), and T5 = targeted yield of 3.5 t ha-1 (50.9:79.9:62.4)] of nutrients (N, P2O5 and K2O) application were laid with four replications in randomized block design following all the standard recommended agronomic practices other than those under treatments. Experimental results clearly indicated that growth characters (plant height number of leaves, dry weight and number of nodule) of soybean plants were significantly affected by different treatments of nutrients application and T5 treatment showed superiority to other treatments. It was also found that seed and stover yields of soybean were affected significantly due to various treatments. The highest seed (2420 kgha-1) and stover (2112 kgha-1) yields were recorded in T5 and T1 treatments, respectively. It was also found that different treatments of nutrients application did not affected soil properties (pH, EC and OC) significantly, however residual content of available N, P and K were altered significantly. Maximum phosphorus content (2.80, 2.96, 2.98 g kg-1) in plant at different days after sowing (30, 45, 60 DAS), respectively was recorded under T5 [targeted yield of 3.5 t ha-1 (N, P2O5 and K2O - 50.9: 79.9: 62.4)] treatment. While, highest phosphorus content in seed (3.66 g kg-1) and stover (2.45 g kg-1) were also recorded in same treatment. Results of the present study further indicated that different P- fractions were significantly affected by the treatments of nutrients application. Content of Saloid-P was lowest and Ca-P was predominant and the various fractions were present in order of Saloid - P< Occl-P< Al-P