Irrigation and nitrogen management in direct seeded basmati rice ( Oryza sativa L.)
KrishiKosh
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Title |
Irrigation and nitrogen management in direct seeded basmati rice ( Oryza sativa L.)
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Creator |
Jagmohan Kaur
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Contributor |
Mahal, S.S.
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Subject |
Direct seeded basmati rice, productivity, water use, quality, irrigation schedules, nitrogen levels, nitrogen splits
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Description |
The investigation entitled, “Irrigation and nitrogen management in direct seeded basmati rice (Oryza sativa L.)” was conducted at the Students’ Research Farm, Department of Agronomy, Punjab Agricultural University, Ludhiana, during kharif 2011 and 2012. The soil of the experimental site was loamy sand in texture with average bulk density of 1.61 g c -3 with normal soil reaction and electrical conductivity, medium in organic carbon, available nitrogen, phosphorus and potassium.The two experiments were laid out in randomized block design with 4 replications using the rice cv Pusa Basmati-1121. The Experiment I was sown on 24th and 23 rd June during 2011 and 2012, espectively and the Experiment II was sown on 24 th June, during both the years. In Experiment I, 10 treatment combinations viz., T 1-Conventional transplanting (Recommended) and 9 others of direct seeding with pre-seeding irrigation i.e.T 2- hold irrigation for 6 days + follow up irrigation at 30 mm CPE, T3- hold irrigation for 6 days + follow up irrigation at 50 mm CPE, T4- hold irrigation for 6 days +follow up irrigation at 70 mm CPE, T5- hold irrigation for 9 days + follow up irrigation at 30 mm CPE, T 6- hold irrigation for 9 days + follow up irrigation at 50 mm CPE, T 7- hold irrigation for 9 days + follow up irrigation at 70 mm CPE, T8-hold irrigation for 12 days + follow up irrigation at 30 mm CPE, T 9- hold irrigation for 12 days + follow up irrigation at 50 mm CPE, T10-hold irrigation for 12 days + follow up irrigation at 70 mm CPE were studied. The Experiment II had 18 treatment combinations viz., three irrigation schedules (30, 50 and 70 mm CPE), three nitrogen levels (40, 60 and 80 kg N ha -1 ) and two nitrogen splits (3 splits i.e. 3, 6 and 9 weeks after sowing) and 4 splits i.e. (0, 3, 6 and 9 weeks after sowing).The results revealed that in Experiment I, the growth parameters, yield attributes as well as grain yield in T 1 were statistically at par with T2, T 5 and T 8 during 2011 and T2 alone during 2012 and significantly superior than all other treatments. Various quality characters of rice like brown, milled and head rice recovery, protein content, minimum cooking time and elongation ratio of treatments T 1, T2 , T5 and T 8 were statistically at par with each other during the first year and T1 and T2 treatments during the second year and were significantly more than rest of the treatments. During 2011, T2, T3, T5, T 6, T8, T 9 and T 1 were statistically at par in terms of water expense efficiency but during 2012, T2,T3,T4 and T 6 were statistically at par and higher than all the treatments. In Experiment II, maximum values of growth parameters, yield attributes, grain yield, protein content, brown, milled and head rice recovery were obtained with irrigations at 30 mm CPE and these were significantly better than 50 and 70 mm CPE irrigation schedules. The maximum water expense efficiency was obtained with irrigations at 30 mm CPE, statistically at par with 50 mm and significantly higher than 70 mm CPE during 2011, but it was significantly higher in 50 mm CPE irrigation schedule during 2012. Among nitrogen levels, the significant increase in growth parameters, yield attributes and grain yield were recorded with each increment of nitrogen up to 60 kg ha -1 . The quality parameters like protein content, brown, milled and head rice recovery were the highest in 80 kg N ha - 1 but statistically at par with 60 kg N ha -1 . Water expense efficiency and apparent water productivity were the highest in 80 kg N ha -1 but were at par with those obtained with 60 kg N ha -1 . Application of nitrogen in 3 or 4 splits failed to have any significant impact on growth parameters, yield attributes, grain yield, quality as well as water expense efficiency of direct seeded basmati rice. |
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Date |
2016-08-06T09:07:57Z
2016-08-06T09:07:57Z 2013 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/71150
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Language |
en
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Format |
application/pdf
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Publisher |
PAU
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