Effect of paddy straw mulching and irrigation on growth and productivity of gobhi sarson (Brassica napus L.)
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Date
2021
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Punjab Agricultural University, Ludhiana
Abstract
The present study entitled, “Effect of paddy straw mulching and irrigation on growth and
productivity of gobhi sarson (Brassica napus L.)” was conducted during the rabi season of
2019-20 at the research farm, Department of Soil and Water Engineering, Punjab Agricultural
University, Ludhiana and Krishi Vigyan Kendra, Muktsar. The soil of the experimental field
was loamy sand and sandy loam at Ludhiana and Muktsar, respectively. The main-plot
treatments included three levels of mulch i.e. no mulch (M0), paddy straw mulch @ 6 tonne ha-1
(M1) and paddy straw mulch @ 9 tonne ha-1(M2) and sub-plots treatments were four irrigation
levels I1: Recommended schedule (4 WAS, end of Dec and end of Feb), I2: two irrigations at
6 and 10 weeks after sowing (WAS), I3: two irrigations at 6 and16 WAS and I4: three
irrigations 6,10 and16 WAS). The experiment was laid in split plot design with four
replications. Application of paddy straw mulching @ 6 t and 9 t ha-1 resulted in significant
increase the growth parameters i.e. plant height, LAI and dry matter production in gobhi
sarson as compared to no mulch application. The results showed that the application of paddy
straw mulch @ 6 t ha-1 increased seed yield of gobhi sarson significantly to the tune of 9.9
and 5.4% for Ludhiana and Muktsar, respectively as compared to no mulch. Further increase
in paddy straw mulch @ 9 t ha-1 resulted in marginal increase in seed yield. Among different
irrigation levels maximum seed yield (24.1 q ha-1) produced under (I4) Irrigation level, was
statistically at par with I1 at Ludhiana. However, at Muktsar, results showed that maximum
seed yield (21.2 q ha-1) was recorded under recommended practice of irrigation schedule (I1)
that was statistically at par with I3 and I4 irrigation levels. However, I2 irrigation level resulted
in significant yield reduction to the tune of 10.1 per cent as compared to I4 level of irrigation
at Ludhiana. Similarly, at Muktsar I2 irrigation level showed significant yield reduction of 9.0
per cent as compared to I1 level of irrigation. Quality parameters like protein and oil content
were not influenced by mulching and irrigation levels at both the locations. The maximum
water-use efficiency (9.9 and 7.1 kg ha-1mm-1) obtained under M2 mulch level at Ludhiana
and Muktsar respectively. Among irrigation levels maximum water-use efficiency (9.9 and
6.9 kg ha-1mm-1) obtained under I2 irrigation level at Ludhiana and Muktsar.
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Citation
Gurdeep Singh, (2021). Effect of paddy straw mulching and irrigation on growth and productivity of gobhi sarson (Brassica napus L.) (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.