Nitrogen and phosphorus management in Kalmegh (Andrographis paniculata) under semi-arid condition of Latur
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Date
2011-03-30
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Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani
Abstract
A field experiment was carried out on effect of different levels of nitrogen and
phosphorus on growth, uptake of N, P and K and biomass yield of kalmegh in kharif
season during the year 2010-11 at Departmental farm. College of Agriculture, Latur.
The experiment was laid in factorial randomized block design with three replications
consisting of four N levels (0, 40, 80 and 120 kg ha’1) and four levels of P (0, 20, 40
and 60 kg ha'1).
The results of field study indicated that the growth uptake of nutrients and
biomass yield of kalmegh were significantly influenced by different levels of N and P.
Application of 120 kg N ha-1 significantly improved all growth parameters in terms of
plant height (50.81 cm), number of leaves (112.00), number of branches (31) and
higher yield parameters i.e. fresh weight per plant (21.40 g), dry weight per plant
(12.71 g), fresh herbage yield per hectare (6352.66 kg) and dry herbage yield per
hectare (2795.00 kg) and uptake of nutrients at all the stages of kalmegh. Soil chemical
properties and available nutrients status of soil after harvest of kalmegh crop were also
improved due to application 120 kg N ha'1. Hence balance of available nitrogen,
phosphorus and potassium was enhanced due to application of 120 kg N ha'1.
Among the different P levels 60 kg P ha'1 was found superior in growth
parameter in terms of plant height (48.01 cm), number of leaves (110.24), number of
branches (30.88) and higher yield parameters i.e. fresh weight per plant (19.62 g), dry
weight per plant (11,34 g), fresh herbage yield per hectare (5598.70 kg) and dry
herbage yield per hectare (2524.98 kg) and uptake of nutrients followed by 40
kg P ha'1. Significant improvement in availability of soil nutrients viz. N, P and K was
observed due to 60 kg P ha'1.
Thus, it can be concluded that application of 120 Kg N and 60 Kg P2O5 ha "1
(N3P3) significantly superior followed by 80 Kg N + 40 Kg P2O5 ha ~ 1 (N2P2) over
control under semiarid conditions of Latur.
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