Effect of Component Densities on the Productivity of Soybean/Maize and Soybean/Sorghum Intercrop     

U. R. Pal    T. O. Oseni  J. C. Norman 《Journal of Agronomy and Crop Science》1993,170(1):66-70

Field experiments were conducted during the wet seasons of 1986 and 1987 at the Yandev Agricultural Experiment Station to investigate the effects of component density on the yield of sorghum or maize intercropped with soybean. Seed yield of the monocrops of sorghum, maize and soybean were higher than the individual components in the intercrops. Yields of component crops in the intercrop varied significantly with the components population density. The sorghum/soybean intercrops which had LER (Land Equivalent Ratio) up to 1.40 in 1986 and 1.35 in 1987 were more productive than soybean/maize intercrop with maximum LER of 1.28 and 1.34 respectively during 1986 and 1987. Similarly the ATER (Area X Time Equivalent Ratio) of sorghum/soybean was greater than in soybean/maize. However, for maximum productivity of sorghum or maize intercropped with soybean, optimum population of one component crop plus 1/2 optimum population of the companion crop is recommended depending on which of the crop is regarded as main or minor crop.  相似文献   

Canopy and Seasonal Profiles of Nitrate Reductase Activity in Field Grown Grain Sorghum     

U. R. Pal  J. M. Kununka 《Journal of Agronomy and Crop Science》1987,159(3):206-211

Field experiments were conducted at the Livestock Research Centre of G.B. Pant University of Agriculture and Technology, Pantnager, India during wet season (June-September) of 1978 with the objectives of characterizing canopy and seasonal profiles of in vivo nitrate reductase activity (NRA) of grain sorghum ( Sorghum bicolor [L.] Moench) cultivars.
Canopy profile of NRA was studied on hybrid CSH 5 at 45, 55, 70, 80 and 95 days after sowing, whereas seasonal profile of NRA was studied in six sorghum cultivars — hybrid CSH 5 and pure line varieties CSV 4, SPV 100, SPV 101, SPV 103 and SPV 106 beginning at 30 days until 95 days after sowing.
Canopy profile studies indicated that fully expanded recently matured leaves possessed higher levels of in vivo NRA than unexpanded immature as well as older leaves. Seasonal profiles of in vivo NRA showed different trends in different cultivars. Cultivars SPV 100, SPV 101, SPV 103 and SPV 106 demonstrated two peaks of in vivo NRA/plant/day at 44 and 95 days. On the other hand, hybrid CSH-5 had only one peak at 51 days and cultivar CSV 4 had none.  相似文献   

Residues of cypermethrin,fenvalerate and deltamethrin on cauliflower     

Parm Pal Singh  Balwinder Singh  Raminderjit Singh Battu 《Phytoparasitica》1990,18(2):153-158

Following the application of Cypermethrin, fenvalerate and deltamethrin to a cauliflower crop at rates of 50, 50 and 12 g a.i. ha^-1, the maximum initial deposits of these insecticides on heads and leaves were 1.10 and 0.75, 1.14 and 0.60, and 0.32 and 0.12 mg kg^-1, respectively. These residue values for fenvalerate were less than the maximum residue limit (MRL) of 2 mg kg^-1 for this crop. While the maximum initial deposits of Cypermethrin and deltamethrin on cauliflower leaves were less than their respective MRL values of 1 and 0.2 mg kg^-1 for brassica leafy vegetables, it took one day for their residues on cauliflower heads to decline below this level.  相似文献   

Changing trend in the seroprevalence and risk factors of human leptospirosis in the South Andaman Island,India          下载免费PDF全文

Ratchagadasse Vimal Raj  Kirubakaran Vinod Kumar  Chandan Lall  Kumaresan Vedhagiri  Attayur Purushothaman Sugunan  Ittoop Pulikkottil Sunish  Paluru Vijayachari 《Zoonoses and public health》2018,65(6):683-689

Seroprevalence of leptospirosis among a healthy population of the South Andaman Island was assessed through random sampling. Previous studies have high seroprevalences of up to 55% in general population and 65% in agricultural labourers. The study subjects (1,181 in total, 781 rural and 400 urban) were interviewed and tested for antibodies against Leptospira. Multivariate models were developed to determine the risk factors in the rural and the urban population. The overall seroprevalence was 10.9%, with rural (12.9%) being higher than the urban subjects (7.0%). The commonest infecting serogroup was Icterohaemorrhagiae (53.5%), followed by Grippotyphosa (13.2%). Compared to the earlier observation, seroprevalence was lower and an apparent shift in the infecting serogroup was found. This shift was in concordance with the changing trend in animal population. Significant difference in risk factors, both in rural and urban areas, was also observed. Similar trends in seroprevalence are being observed around the world. Therefore, time to time prevalence studies are needed for the development of effective control measure.  相似文献   

Variability in pod and seed traits of <Emphasis Type="Italic">Pongamia pinnata</Emphasis> Pierre ecotypes in North Karnataka,India     

Vinod Kumar Patil  G. R. Naik 《林业研究》2016,27(3):557-567

An evaluation of 30 naturally available candidate-plus trees (CPTs) of Pongamia pinnata was carried out to elucidate the genetic variability and relationship of pod and seed traits and progeny growth traits to select the best planting material with higher productivity. Significant variations were observed in pod and seed characteristics, oil content, and during the progeny trial studies. The highest values were found in 100-pod weight (410.4 gm) and 100-seed weight (195.92 gm) and the phenotypic and genotypic variance was found maximum in 100 pod weight (4364.71 and 4289.93) and 100 seed weight (813.8 and 768.93), respectively. Estimates of the phenotypic coefficient of variance were higher than the genotypic coefficient of variance for all the pod and seed traits and progeny growth traits, which depict the predominant role of the environment. Approximately 99 % of broad-sense heritability was revealed in oil content, followed by 100-pod weight (98.28 %), and canopy growth (96.93 %). Pod thickness shows the highest genetic advance of 56.61 %, followed by pod width (53.43 %) and canopy growth (49.3 %). Pod and seed traits have proven a positive correlation between each other and with progeny growth traits, except a few negative values. Hierarchical clustering by Ward’s minimum variance cluster analysis showed phylogeographical patterns of genetic diversity. K-means clustering revealed that trees from different geographical regions were grouped together in a cluster where as trees from the same geographical area are placed in a different cluster. Seven Pongamia ecotypes (GRP-8, 9, 13, 14, 18, 28, and 29) are found superior in traits, namely 100-pod weight, 100-seed weight, oil content, germination rate, plant height, canopy growth, and collar diameter. The traits 100-pod weight and 100-seed weight are highly correlated with the progeny growth traits and even have higher heritability and genetic advantages.  相似文献   

Antifungal activity of the stem bark of Ailanthus excelsa     

Joshi BC  Pandey A  Chaurasia L  Pal M  Sharma RP  Khare A 《Fitoterapia》2003,74(7-8):689-691

The methanol extract of stem barks of Alianthus excelsa was partitioned with chloroform. The chloroform extract showed fungistatic and fungicidal activity against Aspergillus niger, A. fumigatus, Penicillium frequentence, P. notatum and Botrytis cinerea.  相似文献   

In vitro activities of Maesa lanceolata extracts against fungal plant pathogens   总被引：2，自引：0，他引：2  

Okemo PO  Bais HP  Vivanco JM 《Fitoterapia》2003,74(3):312-316

In vitro tests were carried out using extracts of Maesa lanceolata var. goulungensis weir against a broad range of fungal plant pathogens such as Phytophthora cryptogea, Trichoderma virens, Aspergillus niger, Phoma sp., Fusarium oxysporium, Pythium ultimum, Cochliobolus heterostrophus, Rhizoctonia solani, Sclerotium rolfsii and Pyrenophora teres. M. lanceolata extracts were very active against all the pathogens tested except P. ultimum and R. solani.  相似文献   

Valine pathway is more crucial than phenyl propanoid pathway in regulating capsaicin biosynthesis in Capsicum frutescens mill     

Prasad BC  Gururaj HB  Kumar V  Giridhar P  Ravishankar GA 《Journal of agricultural and food chemistry》2006,54(18):6660-6666

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REP-PCR Analysis of Pasteurella multocida Isolates from Wild and Domestic Animals in India     

Saxena MK  Singh VP  Kumar AA  Chaudhuri P  Singh VP  Shivachandra SB  Biswas A  Sharma B 《Veterinary research communications》2006,30(8):851-861

Repetitive extragenic palindromic sequence-based PCR (REP-PCR) was used to characterize 67 field isolates of Pasteurella multocida originating from different animal species and geographical regions of India. REP-PCR was found to be rapid and reproducible (three repeats were done). These isolates yielded different 23 profiles which were clustered into eight groups. The discrimination index was moderate (D value 0.83). Somatic and antigenic typing of the isolates did not reveal any correlation with REP-PCR profiles. There was no host-specific, type-specific, region-specific or pathenogenicity-specific pattern. The REP profiles of isolates obtained from wild animals were similar to those obtained from domestic animals. Two common bands were present in all the isolates irrespective of somatic or antigenic types. The results were not comparable with earlier findings, which had shown high discrimination index and correlation with disease presentation. Saxena, M.K., Singh, V.P., Kumar, A.A., Chaudhuri, P., Singh, V.P., Shivachandra, S.B., Biswas, A. and Sharma, B., 2006. REP–PCR analysis of Pasteurella multocida isolates from wild and domestic animals in India. Veterinary Research Communications, 30(8), 851–861  相似文献   

Morbidity Pattern of the 27th Indian Scientific Expedition to Antarctica     

Abhijeet Bhatia  Ranabir Pal 《The Forestry Chronicle》2012,23(3):231-238.e2

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