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Prankanu Debnath Saroj Kumar Pattanaaik Dinesh Sah Ajai Kumar Pandey 《Archives of Agronomy and Soil Science》2013,59(11):1649-1658
A study was conducted with 24 piedmont soils of Arunachal Pradesh (India) to estimate the critical limit of available boron (B) in soil and cowpea plant for predicting the response of cowpea (Vigna unguiculata L. Walp.) to B application. The critical concentration of available B in these soils was established by graphical procedure at 0.48 mg kg?1 for soil and at 24.5 mg kg?1 in the plant tissues. Soil containing available B below the critical limit responded appreciably to B fertilization. A negative response to B application was also observed in soils at higher level of available B. The average dry matter yield increased with the increasing level of B application up to 1.5 mg kg?1. The yield response to B application in cowpea on B deficient soils was 34.5%. Based on the critical value of 0.48 mg kg?1, 10 soils were rated to be adequate and 20.0% soils belonging to this category responding to B application, whereas 85.7% soils below the critical value showed a positive response to B application. The hot water soluble B was significantly and positively correlated with organic carbon, cation exchange capacity and clay contents and negatively correlated with pH, silt and sand contents of soils. 相似文献
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Samir C. Debnath 《The Journal of Horticultural Science and Biotechnology》2013,88(5):727-732
SummaryForty-eight wild cloudberry (Rubus chamaemorus L.) clones, collected from four Canadian Provinces, were assessed for genetic variability using inter-simple sequence repeat (ISSR)-PCR methods. Nine primers generated 138 polymorphic ISSR bands. A substantial degree of genetic diversity was found among the wild collection. Cluster analysis by the unweighted pair-group method with arithmetic averages (UPGMA) separated the 48 wild clones into six main clusters, and identified the one remaining clone as an outlier. Furthermore, within four of the clusters, the clones tended to form sub-clusters that were in agreement with a principal coordinate (PCO) analysis. Geographical distribution explained 8% of the total variation revealed by analysis of molecular variance (AMOVA). The ISSR markers detected a sufficient degree of polymorphism to differentiate among cloudberry clones, making this technology valuable for germplasm management, and more efficient choices of parents in current cloudberry breeding programmes. 相似文献
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The present study deals with the effect of parallel-laid and cross-laid web of polypropylene needle punched nonwoven fabrics on compression properties (initial thickness, percentage compression, percentage thickness loss and percentage compression resilience) under wet condition. These compression properties of polypropylene needle-punched nonwoven under wet condition have also been compared with its dry condition. With the increase in needling density the initial thickness, percentage compression and percentage thickness loss of the fabrics under wet condition decrease to higher extent compared to its dry condition both in case of parallel-laid and cross-laid fabrics. Cross-laid nonwoven fabric presents lower value of initial thickness percentage compression and thickness loss compared to parallel-laid fabric which is very prominent at high needling density (350 punches/cm2). The percentage compression resilience shows increasing trend with the increase in needling density both under dry and wet conditions of parallel-laid web. It also follows similar trend in case of cross-laid nonwoven under wet condition. The optimum needling density for compression resilience of cross-laid nonwoven fabric under dry condition is 250 punches/cm2. 相似文献
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Ishwar H. Boodi Santosh K. Pattanashetti Basavaraj D. Biradar Gopalakrishna K. Naidu Virupakshi P. Chimmad Anand Kanatti Vinod Kumar Manoj K. Debnath 《Journal of Crop Science and Biotechnology》2016,19(2):177-187
Iron deficiency chlorosis (IDC) causes a significant reduction in yield of groundnut grown in calcareous and alkaline soils in India. The main aim of the study was to assess genotypic differences for morpho-physiological parameters associated with IDC resistance across different stages and their effect on yield and its related traits. The factorial pot experiment was comprised of two major factors, i) soil-Fe status [normal-Fe, deficit-Fe], and ii) genotypes [five] with differential IDC response, constituting 10 treatments. They were assessed for five morpho-physiological parameters associated with IDC resistance across five crop growth stages and also yield and its related traits. Associations between these traits were also estimated. Under deficit-Fe conditions, IDC resistant genotypes recorded significantly lower visual chlorosis rating (VCR), higher SPAD values, active Fe, chlorophyll content, peroxidase activity, and high yield compared to susceptible ones. Between normal- to deficit-Fe soils, resistant compared to susceptible genotypes showed no change in VCR scores; a lower reduction in SPAD, chlorophyll, active Fe, peroxidase activity, and pod yield. Under deficit-Fe conditions, high yield among resistant genotypes could be attributed to higher seed weight, number of pods and haulm yield, while contrasting reduction in main stem height and number of primaries. The results indicate that for initial large-scale screening of groundnut genotypes for IDC resistance, SPAD values are most ideal while active Fe could be utilized for confirmation of identified lines. 相似文献
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G. Suresh N. S. Narasimhan S. Masilamani P. D. Partho Geetha Gopalakrishnan 《Phytoparasitica》1997,25(1):33-39
Using the groundnut rust disease (causal agentPuccinia arachidis Speg.) as the bioassay system, two limonoids from the neem tree (Azadirachta indica A. Juss.) which evinced antifungal activity, were isolated through extraction, solvent fractionation and HPLC. A polar extract derived through solvent partitioning reduced the disease intensity considerably. The polar extract and the impure HPLC fractions were more effective than the pure compounds in reducing the pustule numbers and, consequently, the disease severity. 相似文献
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Carcass characteristics,chemical and fatty acid composition and oxidative stability of meat from broiler chickens fed black cumin (Nigella sativa) seeds 
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下载免费PDF全文 P. Kumar A. K. Patra G. P. Mandal B. C. Debnath 《Journal of animal physiology and animal nutrition》2018,102(3):769-779
A study was conducted to investigate the dietary supplementation of black cumin seeds (BCS) on carcass characteristics, chemical and fatty acid (FA) composition and antioxidant properties of thigh and breast meat of broiler chickens at 42 days of age. Three hundred sixty 1‐day‐old broiler chickens were allocated to five dietary treatment groups (each group containing eight replicate pens with each pen containing nine broiler chickens): basal diet (control; CON), CON + 0.05 g/kg of bacitracin methylene disalicylate (AB), CON + 5 g/kg of BCS (low dose of BCS), CON + 10 g/kg of BCS (medium dose of BCS) and CON + 20 g/kg of BCS (high dose of BCS). Weight (g) of slaughtered birds (p = .03), hot carcass (p = .007), breast (p = .03), thigh (p < .001), wing (p = .06), neck (p = .01), liver (p = .09), abdominal fat (p = .01) and total edible parts (p = .01) increased or tended to increase due to BCS supplementation compared with the CON. The concentrations of dry matter, crude protein and ether extract in chicken thigh and breast meat increased (p = .038 to <.001) with increasing doses of BCS in diets. The ferric reducing antioxidant activity in blood and meat increased linearly with increasing doses of BCS in the diets. However, peroxide values in meat were not affected by BCS and AB on both days 1 and 7 of storage at 4°C. Supplementation of BCS increased the concentrations of C14:1, C18:3n‐6, C20:1, C20:2 FA and PUFA linearly (p < .05) and tended to increase (p = .098) the concentration of C18:2cis linearly. However, the concentrations of C16:0 and C16:1 FA decreased linearly with increasing doses of BCS in the diets. In conclusion, dietary supplementation of BCS at 20 g/kg diet may improve slaughter body weight, beneficial FA concentrations and antioxidant properties of broiler chicken meat. 相似文献
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Tripathi Ayushi Debnath Samir Shukla Susmita 《Journal of Crop Science and Biotechnology》2021,24(3):245-258
Journal of Crop Science and Biotechnology - Mungbean (Vigna radiata L. Wilczek) is an unique source of protein supplement with full of benefits as medicinal and climate friendly crop. Hence from... 相似文献
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True-to-type propagules in half-high, highbush, and hybrid blueberries (Vaccinium L. spp.) were produced using stationary (SB) and temporary immersion bioreactor (TIB) systems containing a liquid medium. Multiple shoots were produced in vitro from nodal segments of blueberry cultivars ‘St. Cloud’ and ‘Polaris’, and of six blueberry hybrids obtained from crossing between half-high/highbush and lowbush blueberries. Shoot proliferation was best in a liquid medium containing 4.6 µM zeatin in both TIB and SB systems, but the performance was genotype dependent. Shoot proliferation was better in hybrids than in cultivars. Although SB produced longer shoots with more leaves per shoot in most of the genotypes, TIB-derived shoots were more vigorous and rooted better under ex vitro condition. Liquid culture-derived elongated shoots were rooted ex vitro by treating with indole-3-butyric acid (39.4 mM) before planting on a 3 peat:2 perlite (v/v) medium. Micropropagules were acclimatized and maintained in a greenhouse with 80?90% survival rate of rooted plantlets. Expressed sequence tag (EST)-polymerase chain reaction (PCR) and EST- and genomic-simple sequence repeat (SSR) marker assay formed a homogenous monomorphic banding pattern in the in vitro-derived and donor control plants proving the clonal fidelity of liquid-culture-derived micropropagated plants. 相似文献