Effect of levels and frequency of boron application on yield and quality of soybean
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Date
2015
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Publisher
JNKVV
Abstract
Thesis Abstract
A field experiment entitled “Effect of levels and frequency of Boron application on yield and quality of soybean” was conducted during the Kharif season of 2014, at the experimental area of Department of Soil Science and Agricultural Chemistry, College of Agriculture, JNKVV, Jabalpur (M.P). The soybean
(JS 97-52) was sown on 10/7/2014 @ 100 kg ha-1 with 40 cm row to row distance.
The basal dose of 20 N-80 P2O5 and 20 k2O kg ha-1 were applied at the time of sowing. The B levels @ 0, 0.5, 1.0, 1.5 and 2.0 kg B ha-1 were applied at single,
alternate and each year in soybean crop. The soybean was harvested on
26/10/2014.
The application of increasing levels of B significantly increased the number of root nodules and number of pods plant-1, N, P, K content at all growth stages, protein content except N at 90 DAS and P at 30 DAS with 0.5 kg B ha-1 over control. However, the B level @ 1.0 kg B ha-1 or higher levels were found significantly superior to 0.5 kg B ha-1 for number of root nodules and pods plant-1, P content at all growth stages except at 45 DAS with 1.0 kg B ha-1 but the difference between 1.0 and 1.5 kg B ha-1 was found non-significant. The highest numbers of nodules were observed with 2.0 kg B ha-1 which was found significantly superior to 0.5 and 1.0 kg B ha-1 but the difference between 1. 5 and 2.0 kg B ha-1 was found non-significant.
The application of B @ 1.0, 1.5 and 2.0 kg ha-1 significantly increased the soybean seed yield over control but the B levels were found on par. The maximum seed yield 1.80 t ha-1 was observed with 1.5 kg B ha-1 which was found significantly superior to 0.5 kg B ha-1. The single or alternate year application of B was found significantly superior to each year B application for seed and haulm yield.
The B content in plant at 30, 45, 90 DAS, seed and haulm, B uptake by seed and total B uptake and after harvest available B successively and significantly increased with increasing levels of B except B content at 90 DAS with 1.5 kg B ha-1 and B uptake by seed & total B uptake with 2.0 kg B ha-1 which were found on par
with the lower or higher levels of B. Each or alternate year B application significantly
increased the B content in soybean at 30 and 45 DAS over single application of B
but the periodicity was found non-significant at 90 DAS.
The application of B @ 0.5 kg ha-1 was found significant over control at 30
DAS. While at later 45 and 90 DAS the B @ 1.0, 1.5 and 2.0 kg ha-1 were found significant over control for S content but the B levels were found on par amongst themselves at both the stages. The maximum sulphur content 0.184 and 0.178% was observed with 1.5 kg B ha-1 at 45 and 90 DAS respectively which was found
significantly superior to 0.5 kg B ha-1 at 90 DAS.
The increasing levels of B significantly increased the N, P, K and S content in seed and haulm and their uptake by seed, haulm and total uptake over control except P and K content in seed and N and P content in haulm with 0.5 kg B ha-1 but B levels were found on par amongst themselves. However, the P content in seed
and K content haulm with 2.0 kg B ha-1 and N, P, K and S uptake by seed as well as
total N and S uptake with 1.5 kg B ha-1 were found significantly superior to 0.5 kg B ha-1. The S content in seed and after harvest @ 1.5 or 2.0 kg B ha-1 were also found significantly superior to 0.5 kg B ha-1.
The highest protein content 41.26 % and oil content 20.28% was observed with1.5 kg B ha-1 which was found significantly superior to 0.5 kg B ha-1 but the B levels @ 1.0, 1.5 and 2.0 kg ha-1 were found at par amongst themselves. The highest oil content 20.28 % was observed with 1.5 kg B ha-1.
No. of root nodules plant-1 and number of pods plant-1 were found significantly and positively correlated with seed yield and B content in seed and its uptake.
Description
Keywords
boron, sowing, soybeans, yields, planting, biological development, thinning, sulphur, proteins, root nodulation