PERFORMANCE OF LATE SOWN TORIA IN RICE FALLOWS UNDER INTEGRATED NUTRIENT MANAGEMENT PRACTICES
Loading...
Date
2019-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
AAU, Jorhat
Abstract
A field experiment entitled “Performance of late sown toria in rice fallows under
integrated nutrient management practices” was carried out at Instructional-cum- Research
Farm, Assam Agricultural University, during the rabi season of 2017-18 and 2018-19. The
experiment was laid out in Randomized Block Design and replicated thrice and consisted of
ten treatments. The treatments were 100% Recommended dose of fertilizer (RDF) (40-35-
15 kg N-P2O5-K2O/ha + 10 kg borax/ha) (T1), 100% RDF + vermicompost @ 2t/ ha (T2),
100% RDF + vermicompost @ 2 t/ ha + 20 kg S/ha (T3), 100% RDF + vermicompost @ 2
t/ha + 20 kg S/ha + 4 kg Zn/ha (T4), 100% RDF + vermicompost @ 2 t/ha + 20 kg S/ha + 4
kg Zn/ha + seed treatment with biofertilizer consortia (T5), 75% RDF (T6), 75% RDF +
vermicompost @ 2t/ ha (T7), 75% RDF + vermicompost @ 2 t/ha + 20 kg S/ha (T8), 75%
RDF + vermicompost @ 2 t/ha + 20 kg S/ha + 4 kg Zn/ha (T9), 75% RDF + vermicompost
@ 2 t/ha + 20 kg S/ha + 4 kg Zn/ha + seed treatment with biofertilizer consortia (T10). The
soils of the experimental sites were sandy loam in texture, acidic in reaction (pH 5.2 and
5.5), medium in organic carbon (0.51 and 0.54%), available N (315.51and 328.71 kg/ha),
available K2O (137.5 and 138.42 kg/ha) and available Zn(0.79 and 0.95 mg/kg) while low
in available P2O5 (17.80 and 20.45 kg/ha), available S (16.12 and 19.83 kg/ha) and
available B(0.21 and 0.25 mg/kg) in both the years, respectively.
Experimental findings revealed that application of 100% RDF + vermicompost @ 2
t/ha + 20 kg S/ha + 4 kg Zn/ha + seed treatment with biofertilizer consortia (T5) resulted in
significantly higher growth parameters viz., plant height, numbers of leaves per plant, leaf
area index, dry matter production per plant and number of primary and secondary branches
per plant and the highest yield attributing characters viz. length of siliqua, number of
siliquae per plant, number of seeds per siliqua in both the years. The highest seed yield
(945.21 and 1025.21 kg/ha in the year 2017-18 and 2018-19, respectively) and stover yield
(2236.98 and 2292.54 kg/ha in 2017-18 and 2018-19, respectively) were also recorded in
T5. However, oil content was significantly higher in treatment having 75% RDF +
vermicompost @ 2 t/ha + 20 kg S/ha + 4 kg Zn/ha + seed treatment with biofertilizer
consortia (T10) but protein content and oil yield of toria in both the years were significantly
higher under the treatment T5. Similar effects of this treatment were also observed in
respect of N, P, K, S, Zn and B-content in seed and stover and their uptake by seed and
stover as well as total uptake as well as in terms of available N, P2O5, K2O, S, Zn and B
in soil after the harvest of the crop in both the years.
The highest gross return ( 61438.65/ha in 2017-18 and 66638.65/ha in 2018-19)
and net return ( 28040.55/ha during 2017-18 and 33240/ha during 2018-19) were also
the highest in T5. However, the highest B: C ratio of 2.78 during 2017-18 and 2.91 during
2018-19 were recorded in treatment having 100% RDF (T1).
Description
Keywords
null