Digital mapping of soil salinity at various depths using an EM38     

Bhaskar Narjary  Murli Dhar Meena  Satyendra Kumar  Sushil Kumar Kamra  Dinesh Kumar Sharma  John Triantafilis 《Soil Use and Management》2019,35(2):232-244

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Primary sulfates in atmospheric sulfates: estimation by oxygen isotope ratio measurements     

Holt BD  Kumar R  Cunningham PT 《Science (New York, N.Y.)》1982,217(4554):51-53

The relative amounts of primary and secondary sulfates in atmospheric aerosols and precipitation can be estimated from measurements of the stable oxygen isotope ratios. The oxygen-18 content of sulfates formed in power plant stack gases before emission into the atmosphere is significantly higher than that of sulfates formed from sulfur dioxide after emission. Results show that 20 to 30 percent of the sulfates in rain and snow at Argonne, Illinois, are of primary origin.  相似文献   

First report of gummy stem blight caused by Didymella bryoniae on muskmelon (Cucumis melo) in India     

J. Sudisha  T. Vasanth Kumar  S. R. Niranjana  H. Shekar Shetty 《Plant pathology》2004,53(4):533-533

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Organic zinc and copper supplementation on antioxidant protective mechanism and their correlation with sperm functional characteristics in goats          下载免费PDF全文

M Narasimhaiah  A Arunachalam  S Sellappan  VK Mayasula  PR Guvvala  SK Ghosh  V Chandra  J Ghosh  H Kumar 《Reproduction in domestic animals》2018,53(3):644-654

Trace minerals feeding had significant effects on sperm production and fertility with better absorption and proper utilization within the body for optimum reproductive function. Several studies have shown that more influenced trace elements in the diets of animals are copper (Cu) and zinc (Zn). Bucks showing deficiency of this mineral might affect the quality of semen production which in turn would affect the fertility. This experiment was thus designed to test the effects of organic Cu and Zn supplementation on antioxidants enzyme activities and sperm functional attributes in fresh semen of bucks. Forty bucks (n = 40, Aged 5 months) were assigned to ten groups of four animals in each group, supplemented (for a period of 8 months) with different levels of organic Zn: 20 mg (T2), 40 mg (T3) and 60 mg (T4), organic Cu: 12.5 mg (T5), 25 mg (T6), 37.5 mg (T7) and combined organic Zn and Cu: 20 + 12.5 mg (T8), 40 + 25 mg (T9), 60 + 37.5 mg (T10), respectively, per kg dry matter and no additional mineral diet (control; T1). One hundred and sixty semen samples were collected through electro‐ejaculator and analysed for sperm quantity, quality, acrosome intactness and plasma membrane integrity and correlated with the catalase, superoxide dismutase, glutathione peroxidase and glutathione reductase enzyme activities in seminal plasma. The results indicated organic Cu and zinc supplemented bucks produced more sperm cells, had higher sperm concentrations, maintained higher (p < .01) sperm livability, plasma membrane and acrosome integrities, more motility and velocity. The increased antioxidant enzyme activities, reduced oxidative stress and lowered lipid peroxidation were positively correlated (p < .05) with the sperm functional attributes. In conclusion, organic Cu and Zn supplement to male goats showed protective roles against oxidative damage and maintained better fresh semen characteristics.  相似文献   

Spermatogenesis and related plasma androgen and progestin level in wild male golden mahseer,Tor putitora (Hamilton, 1822), during the spawning season     

Neetu Shahi  Sumanta Kumar Mallik  Jyoti Pande  Partha Das  Atul Kumar Singh 《Fish physiology and biochemistry》2015,41(4):909-920

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Copper nanoparticle induced macromutation in Macrotyloma uniflorum (Lam.) Verdc. (Leguminosae): a pioneer report     

Sandip Halder  Aninda Mandal  Debadrito Das  Sudha Gupta  Asoke Prasun Chattopadhyay  Animesh Kumar Datta 《Genetic Resources and Crop Evolution》2015,62(2):165-175

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Changes in vasotocin levels in relation to ovarian development in the catfish Heteropneustes fossilis exposed to altered photoperiod and temperature     

Radha Chaube  Rahul Kumar Singh  Keerikattil P. Joy 《Fish physiology and biochemistry》2015,41(5):1173-1186

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High night-time temperature during flowering and pod filling affects flower opening,yield and seed fatty acid composition in canola     

Meghnath Pokharel  Anuj Chiluwal  Michael Stamm  Doohong Min  Davina Rhodes  S.V. Krishna Jagadish 《Journal of Agronomy and Crop Science》2020,206(5):579-596

Winter canola (Brassica napus L.) is highly sensitive to increasing temperatures during the reproductive and pod-filling stages. Although the impact of high day-time temperature stress on yield and quality has been documented in canola, similar information under high night-time temperature (HNT) stress is not available. Using six hybrids and four open-pollinated cultivars, we observed a marked shift in peak flowering towards earlier, cooler hours of the morning under HNT. Averaged across two independent experiments, the photochemical efficiency of photosystem II was significantly decreased (3%), with a significant increase in thylakoid membrane damage (13%) in the leaves of susceptible cultivars under HNT stress. Similarly, the susceptible cultivars also recorded significant reduction in biomass (34%), pod number (22%), pod weight (37%) and total seed weight (40%) per plant while the same set of agronomic traits were not affected among the tolerant cultivars. Quantitative impact of heat stress was confirmed with increased sensitivity to HNT exposure from gametogenesis until maturity resulting in a significantly higher yield loss compared to stress exposure from post-flowering till maturity. HNT significantly decreased oil concentration, but increased protein concentration and saturated fatty acid levels in seeds of the susceptible cultivars. However, HNT had no impact on the unsaturated fatty acids in both hybrids and the open-pollinated cultivars. Breeding targets based on fatty acid composition for enhancing canola seed quality may not be easily amenable due to the inconsistency documented with the compositional changes under heat stress. In summary, our findings conclude that canola hybrids are better suited to regions experiencing heat stress, compared to open-pollinated cultivars, indicating the possibility of a complete shift to hybrid canola cultivation under predicted hotter climates in the future.  相似文献   

In silico and in vivo analysis of binding affinity of estrogens with estrogen receptor alpha in Channa punctatus (Bloch)     

S. Pipil  V. Kumar  V. S. Rawat  L. Sharma  N. Sehgal 《Fish physiology and biochemistry》2015,41(1):31-40

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Effect of conservation agriculture on soil organic and inorganic carbon sequestration and lability: A study from a rice–wheat cropping system on a calcareous soil of the eastern Indo-Gangetic Plains     

Abir Dey  Brahma Swaroop Dwivedi  Ranjan Bhattacharyya  Siba Prasad Datta  Mahesh Chand Meena  Raj K. Jat  Raj Kumar Gupta  Mangi Lal Jat  Vinod Kumar Singh  Debarup Das  Ravi G. Singh 《Soil Use and Management》2020,36(3):429-438

Increasing soil carbon (C) in arable soils is an important strategy to achieve sustainable yields and mitigate climate change. We investigated changes in soil organic and inorganic carbon (SOC and SIC) under conservation agriculture (CA) in a calcareous soil of the eastern Indo-Gangetic Plains of India. The treatments were as follows: conventional-till rice and wheat (CT-CT), CT rice and zero-till wheat (CT-ZT), ZT direct seeded rice (DSR) and CT wheat (ZT-CT), ZTDSR and ZT wheat without crop residue retention (ZT-ZT), ZT-ZT with residue (ZT-ZT+R), and DSR and wheat both on permanent beds with residue (PB-PB+R). The ZT-ZT+R had the highest total SOC in both 0–15 and 15–30 cm soil layers (20% and 40% higher (p < .05) than CT-CT, respectively), whereas total SIC decreased by 11% and 15% in the respective layers under ZT-ZT+R compared with CT-CT. Non-labile SOC was the largest pool, followed by very labile, labile and less labile SOC. The benefits of ZT and residue retention were greatest for very labile SOC, which showed a significant (p < .05) increase (~50%) under ZT-ZT+R compared with CT-CT. The ZT-ZT+R sequestered ~2 Mg ha⁻¹ total SOC in the 0–15 cm soil layer in 6 years, where CT registered significant losses. Thus, the adoption of CA should be recommended in calcareous soils, for C sequestration, and also as a reclamation technique.  相似文献