Effect of tillage practices and P fertilization on soil inorganic P fractions, yield and nutrient uptake by wheat

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dc.contributor.advisorSangwan, P. S.
dc.contributor.authorPanghaal, Dheeraj
dc.date.accessioned2016-10-21T14:01:08Z
dc.date.available2016-10-21T14:01:08Z
dc.date.issued2015
dc.description.abstractLimited information is available on the impact of tillage and P fertilization on soil inorganic P fractions and crop yield. The study was conducted in rabi season of 2013-14 and an ongoing experiment on “Phosphorus management in wheat under different tillage practices in sequence with sorghum crop” initiated in 2011 at Soil Research Farm, Hisar was selected. Experiment was laid out in a split plot design with four replications. Three tillage treatments in main plots [(Zero tillage-ZT (Glyphosate @ 3 l ha -1 used as preplant desiccator at 10-15 days before sowing); conventional tillageCT (two cultivator + two tractor drawn harrowing followed by planking); and minimum tillage-MT (one cultivator + one tractor drawn harrowing followed by planking)] and four P treatments in subplots (0, 45, 60 and 75 kg ha -1 ) were applied in wheat. On these plots, sorghum was raised for fodder in kharif as per other package of practices. The results revealed that after three years, under tillage treatments poor improvement in soil chemical or physical properties is because of poor organic C build up in soils. For soil P fractions, results showed insignificant affect of tillage systems on inorganic soil P fractions except Saloid-P in surface, which significantly increased in ZT. Increasing levels of P application significantly increased all the inorganic soil P fractions over control and lower P levels. All inorganic P fractions were higher in the surface as compared to subsurface soil under various treatments and distribution in different fractions followed the sequence: Ca-P > Fe-P > Al-P > Saloid-P at both the depths. Calcium-P represented on an average 70.2% of total inorganic P extracted from the soil. The values for Fe-P, Al-P and Saloid-P were 15.5, 12.3 and 2.0%, respectively. All these fractions were significantly interrelated meaning thereby that the P transformation is the culmination of release processes from all the fractions and the system seemed to be dynamic. Wheat grain yield under ZT, CT and MT was statistically similar (54.10, 52.43 and 51.75 q ha -1 , respectively) but the values under ZT were superior numerically over other practices. Grain yield of wheat increased with increase in P application over control (46.10 q ha -1 ) under different tillage practices but was significant up to 60 kg P 2O5 ha -1 . Response yard stick values were higher under ZT than under MT or CT. The concentration and uptake of N, P and K by both grain and stover in wheat were significantly affected by application of P but significant differences were recorded only upto 60 kg P 2O5 ha -1 .en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/81258
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subSoil Science
dc.subjectHybrids, Fruits, Heterosis, Planting, Developmental stages, Vegetables, Yields, Biological phenomena, Genotypes, Geneticsen_US
dc.these.typeM.Sc
dc.titleEffect of tillage practices and P fertilization on soil inorganic P fractions, yield and nutrient uptake by wheaten_US
dc.typeThesisen_US
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