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Standardisation of magnesium nutrition in Bajra Napier hybrid (Record no. 289319)

MARC details
000 -LEADER
fixed length control field	05683nam a22001817a 4500
082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER
Classification number	630
Item number	NAV/ST
100 ## - MAIN ENTRY--PERSONAL NAME
Personal name	Navya, M V
245 ## - TITLE STATEMENT
Title	Standardisation of magnesium nutrition in Bajra Napier hybrid
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Place of publication, distribution, etc	Vellayani
Name of publisher, distributor, etc	Department of Agronomy, College of Agriculture
Date of publication, distribution, etc	2021
300 ## - PHYSICAL DESCRIPTION
Extent	92p.
502 ## - DISSERTATION NOTE
Dissertation note	M Sc
520 ## - SUMMARY, ETC.
Abstract	The research work entitled “Standardisation of magnesium nutrition in<br/>Bajra Napier hybrid” was undertaken with an objective to assess the influence of<br/>magnesium nutrition on growth, yield and quality attributes of Bajra Napier hybrid.<br/>The field experiment was carried out during the period October 2020 to April 2021<br/>at Instructional Farm, College of Agriculture, Vellayani.<br/>The experiment was laid out in Randomized Complete Block Design with<br/>9 treatments replicated thrice. The treatment comprised of two factors, namely<br/>MgSO 4 levels (M) and frequency of application (F). The treatment combinations<br/>included three levels of magnesium [m 1 - 80 kg ha -1 , m 2 - 100 kg ha -1 and m 3 - 120<br/>kg ha -1 ] and three frequency of application [f 1 - split application once in 3 months,<br/>f 2 - split application once in 4 months and f 3 - split application once in 6 months].<br/>The crop was raised as per the POP recommendations of KAU (25 t ha -1 FYM and<br/>200:50:50 kg ha -1 NPK). The variety used for the study was Suguna, released from<br/>Kerala Agricultural University. A total of three harvests were taken during the study<br/>period.<br/>The results of the study revealed that growth and yield attributes,<br/>physiochemical characters, quality characters, nutrient status in soil after the<br/>conduct of the experiment, nutrient uptake and economics of cultivation were<br/>significantly influenced by varying levels of MgSO 4 application.<br/>Application of 100 kg MgSO 4 ha -1 (M 2 ) recorded significantly higher tiller<br/>count per hill (23.22), leaf: stem ratio (1.88), green fodder yield (144.35 t ha -1 ) and<br/>dry fodder yield (39.5 t ha -1 ). Physiochemical attributes viz chlorophyll content and<br/>photosynthetic rate (59.14 μmol CO 2 m -2 s -1 ) in Bajra Napier hybrid were<br/>significantly higher in M 2 . Data pertaining to quality characters indicated that crude<br/>protein content (9.48 %) in Bajra Napier hybrid was highest in (M 2 ) and was on par<br/>with M 3 .Application of 100 kg MgSO 4 ha -1 resulted in highest available phosphorus<br/>content (60.47 kg ha -1 ) in the soil and also significantly higher N (454.13 kg ha -1 ),<br/>P (48.65 kg ha -1 ) and Mg uptake (189.59 kg ha -1 ). Significantly higher B: C ratio<br/>(1.99) was observed in M 2 .<br/>However, significantly higher crude fibre content (34.75 %) was observed<br/>in M 1 (80 kg MgSO 4 ha -1 ). Similarly available potassium (214.68 kg ha -1 ) and<br/>calcium content (251.78 mg kg -1 ) in soil were observed to be significantly higher<br/>with application of 80 kg MgSO 4 ha -1 . Significantly higher potassium uptake<br/>(398.89 kg ha -1 ) and K: Mg ratio (3.02) were recorded in M 1 . Application of 120 kg<br/>MgSO 4 ha -1 (M 3 ) resulted in significantly higher magnesium content (38.22 mg kg -<br/>1<br/>) in the soil.<br/>Frequency of application of MgSO 4 significantly influenced various growth<br/>and yield attributes of Bajra Napier hybrid. Highest total green fodder yield (139.59<br/>t ha -1 ) and dry fodder yield (37.14 t ha -1 ), available K status in soil (207.35 kg<br/>ha -1 ), NPK uptake and B: C ratio (1.93) were observed with split application of<br/>MgSO 4 once in 6 months.<br/>Split application of MgSO 4 once in 4 months recorded highest tiller number<br/>(22.43) per hill, chlorophyll content, photosynthetic rate (55.71 μmol CO 2 m -2 s -1 )<br/>and highest phosphorus (57.28 kg ha -1 ) and calcium (237.22 mg kg -1 ) content in<br/>soil. Highest available magnesium content (40.33 mg kg -1 ) in soil and Mg uptake<br/>(171.35 kg ha -1 ) were registered in F 1 (split application once in 3 months).<br/>Significantly higher K: Mg ratio (2.44) was observed in F 1 .<br/>Among the interactions, m 2 f 3 (100 kg ha -1 MgSO 4 given as split application<br/>once in 6 months) recorded highest tiller number (24.72) per hill, total green fodder<br/>yield (153.42 t ha -1 ) and dry fodder yield (40.96 t ha -1 ), chlorophyll content,<br/>photosynthetic rate, crude protein content (10.06 %), highest nitrogen (480.16 kg<br/>ha -1 ) and phosphorus uptake (50.57 kg ha -1 ) and B: C ratio (2.11).Highest available calcium content (257.67 mg kg -1 ) in the soil and<br/>potassium uptake (421.10 kg ha -1 ) were observed in m 1 f 3 (80 kg ha -1 MgSO 4 given<br/>as split application once in 6 months) and was comparable with treatment m 1 f 2 .<br/>The treatment combination m 2 f 2 (100 kg ha -1 MgSO 4 given as split<br/>application once in 4 months) registered significantly higher available phosphorus<br/>content (73.65 kg ha -1 ) in the soil. The highest soil magnesium content (43.67 mg<br/>kg -1 ) was observed in the treatment combination m 3 f 1 (120 kg ha -1 MgSO 4 given as<br/>split application once in 4 months).<br/>The treatment combination m 2 f 1 (100 kg ha -1 MgSO 4 given as split<br/>application once in 3 months) resulted in significantly higher magnesium uptake<br/>(201.84 kg ha -1 ).<br/>Based on the results of the study, it was revealed that growth, yield, quality<br/>parameters, crop nutrient uptake and economics of cultivation in Bajra Napier<br/>hybrid were significantly influenced by varying levels and frequency of application<br/>of MgSO 4 . It could be concluded that, 100 kg MgSO 4 ha -1 given as split application<br/>once in 6 months was the best treatment.
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element	Agronomy
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element	Bajra Napier hybrid
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Usha C Thomas (Guide)
856 ## - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier	https://krishikosh.egranth.ac.in/handle/1/5810216209
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Source of classification or shelving scheme	Dewey Decimal Classification
Item type	Theses

Holdings
Not for loan	Collection code	Home library	Current library	Shelving location	Date acquired	Full call number	Barcode	Date last seen	Koha item type
	Reference Book	KAU Central Library, Thrissur	KAU Central Library, Thrissur	Theses	20/04/2022	630 NAV/ST PG	175257	20/04/2022	Theses