Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810094511
Authors: MOUNIKA, BONU
Advisor: PULLA RAO, CH
Title: INTEGRATED NUTRIENT MANAGEMENT IN RICE - JOWAR SEQUENCE IN KRISHNA ZONE OF A.P.
Publisher: Acharya N.G. Ranga Agricultural University
Language: en_US
Type: Thesis
Pages: 277
Agrotags: null
Keywords: RICE, JOWAR
Abstract: A field experiment entitled “Integrated Nutrient Management in rice-jowar sequence in Krishna zone of A.P.” was conducted for two consecutive years (2015- 2016 and 2016-2017) on sandy clay loam soil of Agricultural College Farm, Bapatla. The treatments consisted of different combinations of nitrogen i.e. T1 :100 % RDN, T2 :75% RDN + 25% Farmyard manure, T3 :50% RDN + 50% Farmyard manure, T4 :25% RDN + 75% Farmyard manure, T5 :75% RDN + 25% Poultry manure, T6 :50% RDN + 50% Poultry manure, T7 :25% RDN + 75% Poultry manure, T8 :75% RDN + 25% Vermicompost, T9 :50% RDN + 50% Vermicompost, T10 :25% RDN + 75% Vermicompost, T11 :75% RDN + 25% Green manure, T12 :50% RDN + 50% Green manure and T13 :25% RDN + 75% Green manure. The investigation was carried out in kharif and rabi seasons and kharif rice experiment was laid out in randomized block design with thirteen treatments and replicated thrice. The rabi experiment was laid out on the same site in a split plot design without disturbing the soil (under no till conditions) for succeeding jowar crop and each of the kharif plot was divided into three sub-plots to receive three levels of nitrogen (N0: 0% N, N50: 50% N and N100:100% N) to each plot. The experiment on rice-jowar sequence as detailed above was repeated on a separate site but in the same block during kharif and rabi in 2016 and 2017, respectively. Popular cultivars of rice and jowar, BPT-5204 and Mahalakshmi-296 respectively, were chosen for the study. Data collected on growth parameters (plant height, drymatter accumulation), yield attributes, grain yield, straw yield, harvest index and nutrient uptake of rice were subjected to statistical analysis and results indicated that all the characters studied were significantly higher with application of 100% RDN through inorganic fertilizer (T1), however it was on a par with that of application of 50% RDN+ 50 % Green manure (T12) and 50% RDN + 50% Poultry manure (T6) during both the years of study. Physical and nutritional (quality) characters of rice grain like amylase content, volume expansion ratio, kernel elongation ratio and water uptake were significantly influenced by application of inorganic and organic sources of nitrogen. Whereas, milling quality parameters like hulling, milling percentages and head rice recovery, were not significantly influenced by application of inorganic and organic sources of nitrogen. Growth parameters, yield attributes, grain yield, economic returns and nutrient uptake of jowar were significantly influenced by the different combinations of nitrogen sources applied to kharif rice crop. Plant height, drymatter accumulation, number of ear heads m-2, ear head length, ear head weight, test weight, grain yield, stover yield, economic returns and nutrient uptake of jowar which received 100% RDN through inorganic fertilizer (T1) were remained on a par with 50% RDN+ 50 % Green manure (T12) and 50% RDN + 50% Poultry manure (T6) which were applied during preceding kharif rice were significantly higher than the other combinations of nitrogen sources. Irrespective of different combinations of sources of nitrogen in kharif rice, nitrogen levels imposed to succeeding jowar (N0 to N100), N100 treatment increased the grain yield significantly in 1st and 2nd year of study i.e. 3081 kg ha-1 and 3251 kg ha-1 and 3594 kg ha-1 and 3991 kg ha-1 respectively. The maximum grain yield of jowar i.e. 3307 kg ha-1 and 3575 kg ha-1 was recorded with the application of 100% N level and residual affect of 100% RDN through inorganic fertilizer applied to preceding rice crop. In general, the available N, P and K status after harvest of each cropping sequence was lower following residual affect of 100% RDN through inorganic fertilizer and 100% N level than the other combinations of sources and levels of nitrogen due to high uptake of nutrients by the crop during both the years of study. The higher gross and net returns and higher returns per rupee investment were obtained with recommended dose of fertilizers of 100% RDN (T1), followed by 50% RDN+ 50% Green manure and 50% RDN + 50% Poultry manure applied to kharif rice crop and 100% N level imposed to rabi jowar crop. Overall, the field studies conducted for two consecutive years clearly indicated that the application of 100% RDN through inorganic fertilizer was remained on par with combined application of inorganic and organic sources i.e green manure and poultry manure (@ 50% each) and these treatments had a significant influence in increasing productivity and profitability in rice - no till jowar sequence. It is therefore, concluded that application of 100% RDN through inorganic fertilizer, 50% RDN+ 50 % Green manure and 50% RDN + 50% Poultry manure to kharif rice followed by 100% N level to succeeding rabi jowar was the best under no till conditions of this region. Hence, rice-no till jowar is the profitable cropping sequence of this region.
Description: D5598
Subject: Agronomy
Theme: INTEGRATED NUTRIENT MANAGEMENT IN RICE - JOWAR SEQUENCE IN KRISHNA ZONE OF A.P.
Research Problem: INTEGRATED NUTRIENT MANAGEMENT IN RICE - JOWAR SEQUENCE IN KRISHNA ZONE OF A.P.
These Type: Ph.D
Issue Date: 2018
Appears in Collections:Thesis

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