Improving soil organic carbon pools through inclusion of summer mungbean in cereal-cereal cropping systems in Indo-Gangetic plain     

Kali Krishna Hazra  Probir Kumar Ghosh  Madasur Subbabhat Venkatesh  Chaitanya Prasad Nath  Narendra Kumar  Mohan Singh 《Archives of Agronomy and Soil Science》2018,64(12):1690-1704

Long-term effect of mungbean inclusion in lowland rice-wheat and upland maize-wheat systems on soil carbon (C) pools, particulate organic C (POC), and C-stabilization was envisaged in organic, inorganic and without nutrient management practices. In both lowland and upland systems, mungbean inclusion increased very-labile C (Cfrac₁) and labile C (Cfrac₂) in surface soil (0–0.2 m). Mungbean inclusion in cereal-cereal cropping systems improved POC, being higher in lowland (107.4%). Lowland rice-based system had higher passive C-pool (11.1 Mg C ha^?1) over upland maize-based system (6.6 Mg C ha^?1) indicating that rice ecology facilitates the stabilization of passive C-pool, which has longer persistence in soil. Organic nutrient management (farmyard manure + full crop residue + biofertilizers) increased Cfrac₁ and carbon management index (CMI) over inorganic treatment. In surface soil, higher CMI values were evident in mungbean included cropping systems in both lowland and upland conditions. Mungbean inclusion increased grain yield of cereal crops, and yield improvement followed the order of maize (23.7–31.3%) > rice (16.9–27.0%) > wheat (lowland 7.0–10.7%; upland 5.4–16.6%). Thus, the inclusion of summer mungbean in cereal-cereal cropping systems could be a long-term strategy to enrich soil organic C and to ensure sustainability of cereal-cereal cropping systems.  相似文献   

Antinociceptive activity of Helicteres isora     

Venkatesh S  Laxmi KS  Reddy BM  Ramesh M 《Fitoterapia》2007,78(2):146-148

Helicteres isora root extracts were studied for antinociceptive activity on acetic acid-induced writhing test in mice, at a dose of 250 mg/kg. Petroleum ether, chloroform and aqueous ethanol extracts have shown significant activity.  相似文献   

Effect of Helicteres isora root extracts on glucose tolerance in glucose-induced hyperglycemic rats     

Venkatesh S  Dayanand Reddy G  Reddy YS  Sathyavathy D  Madhava Reddy B 《Fitoterapia》2004,75(3-4):364-367

The ethanol, ethyl acetate and butanol extracts of Helicteres isora root showed significant oral hypoglycemic activity on glucose loaded rats at a dose of 250 mg/kg. The butanol extract showed maximum antihyperglycemic activity and effect being comparable to that of glibenclamide.  相似文献   

Antihyperglycemic activity of Caralluma attenuata   总被引：1，自引：0，他引：1  

Venkatesh S  Reddy GD  Reddy BM  Ramesh M  Rao AV 《Fitoterapia》2003,74(3):274-279

Extracts of Caralluma attenuata are screened for their antihyperglycemic activity. Ethanol, chloroform and butanol extracts were tested on glucose loaded and alloxan-induced diabetic rats. In both tests, the butanol extract, at the oral dose of 250 mg/kg, has shown statistically significant and considerable antihyperglycemic activity.  相似文献   

Hydrological impacts of afforestation — A review of research in India     

B. Venkatesh  N. Lakshman  B. K. Purandara 《林业研究》2014,25(1):37-42

We review the current status of experimental studies in India to understand the linkages between afforestation and hydrology. This discipline deals with the use and management of water, social awareness of environmental problems, and ecosystem limitations on provision of watershed services by river basins in the mountain regions of India. Our review begins with examination of experimental works in tropical countries and proceeds to discussion of initiatives of Indian research institutes and Government organizations towards establishing experimental watersheds to understand the impacts of land cover changes on hydrologic regimes in the Indian sub-continent. This is followed by the review of the experimental work carried out by various authors to assess the impact of land cover changes on major water balance components such as, runoff, groundwater, evapotranspiration and sediment yield. The spatial scales of these experiments have been limited to small watersheds or field plots. This paper also describes impacts of human interventions （such as planta- tions of exotic forest species to restore degraded landscapes） on the water balance components in diverse hydro-geo-environmental conditions in the Indian sub-continent. We focus on identifying the research areas which require immediate attention to develop tools to assist planners and policy makers in assessing and managing the water resources in these complex environments. The review is largely based on research results reported during the last 20 to 30 years.  相似文献   

A molecular switch and proton wire synchronize the active sites in thiamine enzymes     

Frank RA  Titman CM  Pratap JV  Luisi BF  Perham RN 《Science (New York, N.Y.)》2004,306(5697):872-876

Thiamine diphosphate (ThDP) is used as a cofactor in many key metabolic enzymes. We present evidence that the ThDPs in the two active sites of the E1 (EC 1.2.4.1) component of the pyruvate dehydrogenase complex communicate over a distance of 20 angstroms by reversibly shuttling a proton through an acidic tunnel in the protein. This "proton wire" permits the co-factors to serve reciprocally as general acid/base in catalysis and to switch the conformation of crucial active-site peptide loops. This synchronizes the progression of chemical events and can account for the oligomeric organization, conformational asymmetry, and "ping-pong" kinetic properties of E1 and other thiamine-dependent enzymes.  相似文献   

Duck hepatitis B virus (DHBV) infection in Indian domestic ducks: A pilot study     

G. Sridhar  T. Valliammai  C. S. Varalakshmi  K. Udayasankar  M. Panchanadam  J. Ramakrishna  K. Venkatesh Gopal  Kunthala Jayaraman  S. P. Thyagarajan 《Tropical animal health and production》1993,25(4):229-233

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Genetics of growth habit in horse gram [Macrotyloma uniflorum (Lam.) Verdc.]     

Chandana  Basalapura Rangegowda  Ramesh  Sampangi  Basanagouda  Gonal  Kirankumar  Rotti  Ashwini  Kyasampalli Venkatesh Reddy 《Genetic Resources and Crop Evolution》2021,68(7):2743-2748

Genetic Resources and Crop Evolution - Growth habit is a plant architectural trait in grain legumes with no exception of horse gram [Macrotyloma uniflorum (Lam.) Verdc.]. Determinacy and...  相似文献   

Determination of Critical Tissue Phosphorus Concentration in Mungbean and Urdbean for Plant Diagnostics     

M. S. Venkatesh  K. K. Hazra  P. K. Ghosh 《Journal of plant nutrition》2014,37(12):2017-2025

A pot experiment was conducted to study the effect of phosphorus (P) nutrition on mungbean and urdbean genotypes and to determine the critical concentration of tissue phosphorus at different growth stages for plant diagonostic and P management. There were eight treatments consisting of different levels of P added in the form of monopotassium phosphate (KH₂PO₄). Destructive plant samples were taken to determine tissue P concentration and plant dry matter at different growth stages. Plant tissue P concentration was found highly correlated with dry matter production in mungbean (r² = 0.84–0.98) and urdbean (r² = 0.98–0.998) at corresponding sampling period throughout the growth stages. Considerable variation was observed in critical P concentration with genotypes and leaf position in mungbean and urdbean. Critical P concentration varied between 0.45–0.49 in mungbean and 0.45 to 0.57 in urdbean at early stages of crop growth, and these values declined sharply with advancement in crop growth.  相似文献   

Amorphous Solid Water: An X-ray Diffraction Study     

Venkatesh CG  Rice SA  Narten AH 《Science (New York, N.Y.)》1974,186(4167):927-928

Water vapor that condenses on a metal surface at 10 degrees K forms a noncrystalline phase of estimated density 1.2 grams per cubic centimeter. X-ray diffraction data of high precision and resolution have been analyzed to yield oxygen atom pair correlation functions. The positional correlation in amorphous solid water extends over only a few molecular radii, and the radial distribution of nearneighbor oxygen atoms in amorphous solid water is qualitatively different from that found in the low-pressure ice modifications. Amorphous solid water is a useful material for liquid water models because it can be studied under conditions such that the effects of static disorder and thermal excitation can be separated.  相似文献