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排序方式: 共有144条查询结果,搜索用时 15 毫秒
141.
Gandura Omar Abagandura Sangeeta Bansal Audrey Karsteter Sandeep Kumar 《Soil Use and Management》2022,38(1):487-502
Soil amendments can help reduce greenhouse gas (GHG) emissions and increase soil organic carbon (SOC) and crop yield. However, most biochar studies have been conducted on single soil type under controlled conditions. To address this limitation, the aim of this research was to investigate how field biochar and manure applications affect soil quality, plant productivity, and GHG emissions at eroded (sandy loam) and depositional (clay loam) positions in a climate transition zone (udic to ustic and mesic to frigid temperature). A field study was established in 2013 in South Dakota, USA, under a corn–soya bean rotation. Soil treatments included biochar, manure, a manure and biochar mixture, and a control (untreated soil). Soil properties (pH, electrical conductivity (EC), SOC, available nitrogen, available phosphorus and available potassium) were measured in 2017. Plant productivity parameters in 2016 and 2017 and GHG fluxes were measured during the 2016 and 2017 growing seasons. Compared with the control, SOC increased under all treatments at the eroded position (biochar 26%, manure 24%, and manure–biochar mixture 15%) and increased under biochar (25%) and the manure–biochar mixture (25%) at the depositional position. Plant parameters were similar under all treatments at both positions. Area-scaled CO2 fluxes were lower in soils treated with biochar compared with the control at the eroded landscape position but not at the depositional landscape position. Area-scaled N2O fluxes were lower in soils treated with biochar at both positions. Furthermore, the biochar–manure mixture treatment emitted lower area-scaled N2O fluxes compared with manure alone at both positions. This study suggests that for eroded and depositional landscape positions, biochar can improve soil organic carbon and the effects of the biochar and biochar–manure mixture on GHG emissions vary based on the soil texture. 相似文献
142.
Kamlesh Saharan Neelam Khetarpaul 《Plant foods for human nutrition (Dordrecht, Netherlands)》1994,45(4):321-329
The flour of raw as well as cooked vegetable pea cultivars (Arkal and Bonneville) was used for biological evaluation of their protein quality. Cooking did not have a significant influence on the food intake. There were some differences in the food as well as protein intake and gain in body weights of rats when fed uncooked or cooked pea flour diets. Varietal differences did not seem to influence on apparent digestibility, true digestibility, biological value, net protein utilization and utilisable protein but cooking brought a significant (p<0.05) improvement in all of above mentioned parameters. Varietal differences as well as cooking exhibited no influence or serum protein concentration. 相似文献
143.
The transcriptional landscape of the mammalian genome 总被引:1,自引:0,他引:1
Carninci P Kasukawa T Katayama S Gough J Frith MC Maeda N Oyama R Ravasi T Lenhard B Wells C Kodzius R Shimokawa K Bajic VB Brenner SE Batalov S Forrest AR Zavolan M Davis MJ Wilming LG Aidinis V Allen JE Ambesi-Impiombato A Apweiler R Aturaliya RN Bailey TL Bansal M Baxter L Beisel KW Bersano T Bono H Chalk AM Chiu KP Choudhary V Christoffels A Clutterbuck DR Crowe ML Dalla E Dalrymple BP de Bono B Della Gatta G di Bernardo D Down T Engstrom P Fagiolini M Faulkner G Fletcher CF Fukushima T 《Science (New York, N.Y.)》2005,309(5740):1559-1563
144.
Summary The effect of water stress (5 days of no watering) on leaf growth and its subsequent recovery after 5 days of watering was
investigated in potted plants of eight potato (Solanum tuberosum L.) genotypes. The genotypes fell into three groups. Group A was characterized by minimum growth reduction under stress and
rapid recovery on rewatering with final increase in leaf length exceeding that of the unstressed controls. In Group B, stress
created moderate reduction in growth and on recovery the increase in leaf length became comparable to that of controls. Group
C was characterized by large growth reduction and rewatering did not result in final leaf length increases comparable to that
of controls. Statistical analysis showed a negative correlation between reduction in growth and stomatal conductance (r=−0.917;P<0.01) and between reduction in growth and transpiration (r=−0.912;P<0.01).
CPRI Publication No. 812. 相似文献