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国外农业航空静电喷雾技术研究进展与借鉴 总被引：1，自引：0，他引：1
农业航空静电喷雾技术作为中国发展精准农业航空应用技术的内容之一,对农药的有效利用和减少环境污染有积极意义.农业航空静电喷雾技术在国外发展较早也相对成熟,美国已有应用于有人机的商业化产品,并在美国、巴西等国各类粮食作物、经济作物和杂草防治作业中开展了大规模田间应用.该研究首先从基础研究、田间应用和优化工作等方面梳理了国外... 相似文献
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Noureen Arshad Khalid Mahmood Zia Farukh Jabeen Muhammad Naveed Anjum Nadia Akram Muhammad Kaleem Khosa 《Fibers and Polymers》2018,19(11):2219-2228
The research work was carried out to synthesize a series of novel chitosan based water dispersible polyurethanes (CS-WDPUs). The three step synthesis involves the formation of end capped PU-prepolymer was formed through the reaction between polyethylene glycol (PEG) (Mn=600 g/mole, dimethylolpropionic acid (DMPA) and isophorone diisocyanate (IPDI) followed by the preparation of neutralized NCO terminated PU-prepolymer, which lead to the chain extension by using the chitosan. The dispersion of the obtained product was carried out by adding proper proportion of water. The synthesized CS-WDPUs were applied onto the different qualities of plain weave poly-cotton printed and dyed textile swatches by employing pad-dry-cure procedures. The textile assets of the treated and untreated textile swatches were assessed, as color fastness, pilling resistance, tear and tensile strength. The results showed that the chitosan incorporation into PU backbone has significant effect on the assets of treated textiles. These synthesized CS-WDPUs are eco-friendly bio-based finishes with potential applications for polyester/cotton textiles. 相似文献
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Azhar Abbas Muhammad Yaseen Muhammad Khalid Muhammad Naveed Muhammad Zahir Aziz Yasir Hamid 《Journal of plant nutrition》2017,40(16):2303-2311
A field experiment was conducted to evaluate effect of biochar-amended urea on nitrogen economy of soil for improving the growth and yield of wheat under field condition. Experiment plan was comprised of twelve treatments with four replications including treatments without application of urea and biochar (control) and urea only. Biochar was applied at 1–10% of the weight of urea fertilizer applied each treatment. Results showed that application of biochar at 10% with recommended dose of urea significantly improved plant height, spike length, number of tillers, number of spikelet per spike, 1000 grain weight, grain yields, biomass yield, harvesting index, nitrogen (N) concentration and uptake in grain and straw, and agronomic efficiency of nitrogen by 6.0%, 11.1%, 32.0%, 55.3%, 5.4%, 38.0%, 19.0%, 9.0%, 19.0%, 26.0%, 65.0%, 50.0%, and 63.0%, respectively, as compared to treatment comprised of recommended rate of nitrogen without biochar. 相似文献
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Muhammad Saeed Daryoush Babazadeh Muhammad Naveed Muhammad Asif Arain Faiz Ul Hassan Sun Chao 《Tropical animal health and production》2017,49(7):1329-1338
Betaine is found ubiquitously in plants, animals, microorganisms, and rich dietary sources including seafood, spinach, and wheat bran. The chief physiological role of betaine is to function as a methyl donor and an osmolyte. Betaine also acts as an osmolyte, to maintain the avian’s cellular water and ion balance to improve the avian’s capacity against heat stress via preventing dehydration and osmotic inactivation. It helps in maintaining the protective osmolytic activity, especially in heat-stressed birds. Betaine may promote various intestinal microbes against osmotic variations and thus improve microbial fermentation activity. Previous studies showed that dietary supplementation of betaine in poultry diets could positively affect nutrients’ digestibility, reduce abdominal fat weight, and increase breast meat yield. In addition, betaine has been reported to protect internal organs and boost their performance. Its inclusion in poultry diet is sparing essential amino acids like choline and methionine. In addition, it may play an important role in lean meat production by positively affecting the lipid metabolism with increased fatty acids catabolism and thus reducing carcass fat deposition. The aim of this review article was to broaden the knowledge regarding betaine and its importance in the poultry industry to cope with the heat stress problem. Moreover, it should be added to the diet as a natural anti-stressor through different routes (water/feed) to overcome the heat stress problem. However, further studies need to be conducted at the genetic and molecular basis to elucidate the mechanism behind the betaine as a natural anti-heat agent to decrease the heat stress problem in the poultry industry. 相似文献
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Signatures of adaptation to obligate biotrophy in the Hyaloperonospora arabidopsidis genome 总被引：2，自引：0，他引：2
Baxter L Tripathy S Ishaque N Boot N Cabral A Kemen E Thines M Ah-Fong A Anderson R Badejoko W Bittner-Eddy P Boore JL Chibucos MC Coates M Dehal P Delehaunty K Dong S Downton P Dumas B Fabro G Fronick C Fuerstenberg SI Fulton L Gaulin E Govers F Hughes L Humphray S Jiang RH Judelson H Kamoun S Kyung K Meijer H Minx P Morris P Nelson J Phuntumart V Qutob D Rehmany A Rougon-Cardoso A Ryden P Torto-Alalibo T Studholme D Wang Y Win J Wood J Clifton SW Rogers J Van den Ackerveken G Jones JD 《Science (New York, N.Y.)》2010,330(6010):1549-1551
Many oomycete and fungal plant pathogens are obligate biotrophs, which extract nutrients only from living plant tissue and cannot grow apart from their hosts. Although these pathogens cause substantial crop losses, little is known about the molecular basis or evolution of obligate biotrophy. Here, we report the genome sequence of the oomycete Hyaloperonospora arabidopsidis (Hpa), an obligate biotroph and natural pathogen of Arabidopsis thaliana. In comparison with genomes of related, hemibiotrophic Phytophthora species, the Hpa genome exhibits dramatic reductions in genes encoding (i) RXLR effectors and other secreted pathogenicity proteins, (ii) enzymes for assimilation of inorganic nitrogen and sulfur, and (iii) proteins associated with zoospore formation and motility. These attributes comprise a genomic signature of evolution toward obligate biotrophy. 相似文献
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Arshad Usman Azeem Farrukh Mustafa Ghulam Bakhsh Allah Toktay Halil McGiffen Milt Nawaz Muhammad Amjad Naveed Muhammad Ali Muhammad Amjad 《Gesunde Pflanzen》2021,73(4):591-601
Gesunde Pflanzen - Biochar (BC) is known to enhance plant growth and may activate plant resistance to various soil borne pathogens. In this experiment, the rice husk (RH) BC was combined with... 相似文献
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Sadia Nazir Noor Khan Hamda Azmat Saima Naveed Malik Muhammad Ramzan Simon J. Davies 《Journal of the World Aquaculture Society》2023,54(1):143-155
A study was conducted to determine the artificial breeding response, embryonic and larval development of giant snakehead, Channa marulius, with the application of various dosages of stimulatory hormones: Suprefact® (LHRH) agonist and Ovaprim® (GnRH + dopamine inhibitor). First and second hormonal dosages of Suprefact® (diluted) and Ovaprim® (0.3, 0.4, and 0.5 ml for male and 0.8, 0.9, and 1.0 ml for females per kilogram body weight) were used. There were three treatments T1, T2, and T3 and each treatment had three replicates. Male fish were treated with T1 (0.3), T2 (0.4), T3 (0.5) ml kg−1 of body weight while female fish with T1 (0.8), T2 (0.9), T3 (1.0) ml kg−1 of body weight. The results showed that fish stimulated with T3 (1.0) obtained better fecundity rate (2951.7) followed by T2 (0.4) (2678.3), while the lowest fecundity (466.7) was recorded in T1. The numerically higher values of gonado-somatic index (males and females) and fertilization rate appeared in T2. The highest survival rate (97.1%) was found in T3 followed by T2 (97.0%), while the lowest (32.2%) in T1. In conclusion, the application of Suprefact® and Ovaprim® at 0.4 and 0.5 ml kg−1 body weight for male and 0.9 and 1.0 ml kg−1 for female fish successfully stimulated snakehead fish induced breeding. 相似文献
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Iqbal Naveed Khan Muhammad Tahir Amanullah Haq Din Israru Khan Hamayun Shah Muqader Mushtaq Muhammad 《Tropical animal health and production》2019,51(8):2181-2186
Tropical Animal Health and Production - Poor quality feed and lack of feed resource conservation in Pakistan are the major constraints influencing livestock production systems in the country. In... 相似文献
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A split plot trial involving Ailanthus triphysa (ailanthus) at four spacings (3 m×1 m, 2 m×2 m, 3 m×2 m and 3 m×3 m) and four fertiliser regimes (0:0:0, 50:25:25, 100:50:50 and 150:75:75 kg ha−1 per year N, P2O5, K2O) was initiated in June 1991. Objectives included evaluating the growth and yield potential of ailanthus grown under differing density and fertiliser regimes and to estimate the nutrient export through harvest. Ninety-six randomly selected average-sized trees were felled at 8.8 years of age for assessment. Results show that height, diameter, stand leaf area index, biomass production and volume yield were greater in the 2 m×2 m spacing. Repeated application of fertilisers at 1.2, 2.25 and 5.25 years after planting had little effect on biomass and volume yields, presumably because of weed competition (despite periodic weed control), higher pest incidence (in the heavily fertilised plots) and/or moderately adequate soil nutrient levels. Regarding partitioning of tree biomass, stem wood represented the principal component (>70%), while foliage contributed the least (<7%). Conversely, foliar N, P and K concentrations were the highest, followed by branch wood, coarse roots and stem wood. Denser stands showed greater accumulation of N, P and K with higher potential for nutrient export through harvest. However, as the bole fraction accounted for only about 56–64% of the total nutrients removed, leaving other biomass components (foliage and branches) at the site will reduce the associated nutrient export. Wider spacings (3 m×2 m and 3 m×3 m) were more efficient in N and K use, but P use efficiency was higher in 2 m×2 m. Likewise, trees in the no fertiliser plots exhibited greatest N, P and K use efficiencies. Available soil P, K and organic C levels declined with increasing tree density, while repeated fertilisation increased nutrient concentrations. Soil pH and available P levels declined in comparison to the pre-treatment values. 相似文献