共查询到20条相似文献,搜索用时 62 毫秒
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特早熟棉花新品种——辽棉14刘少明杨桦辽宁省经济作物所111000特早熟棉花新品种辽棉14号,是辽宁省经济作物科学研究所于1984年以早熟品系辽692为母本,以抗枯、黄萎病品系辽1038为父本杂交,经过多年定向选择培育而成。于1996年经辽宁省品种审... 相似文献
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早熟抗病棉花新品种──辽棉12刘少明辽宁省经作所辽阳111000辽棉12是辽宁省经济作物科学研究所由4228×4082组合后代在病圃上连续定向选择而培育出来的早熟、抗病、优质、丰产的棉花新品种。1988年参加北方特早熟棉区短季棉品系联合试验。1988... 相似文献
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1充分利用棉花抗病资源 ,实现病区棉花品种换代辽宁省为我国特早熟棉区 ,棉花品种的抗枯、黄萎病能力和棉花纤维品质都具有独特优势 ,在棉花抗病育种方面具有丰富的抗病育种资源 ,除早熟、丰产外 ,高抗枯、黄萎病是辽宁省棉花品种最突出的特点。自 80年代以来 ,辽宁省利用各种抗病资源 ,培育了 1 7个特早熟棉花品种 ,其中包括 5个高抗枯、黄萎病的新品种。累计推广面积已达5 33.33多万公顷。 1 996年 1 1月审定的辽棉 1 5号保持了高抗枯萎病的特点 ,枯萎病指数为 0 .5 ,同时在抗黄萎病方面又有进一步的进展 ,黄萎病指数7.45 ,是辽宁目前所有… 相似文献
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W. L. Porter 《American Journal of Potato Research》1967,44(10):382-382
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Effects of timing and rate of N fertilizer application on concentrations of P, K, S, Ca, Mg, Na, Cl, Mn, Fe, Cu and Zn in herbage from perennial ryegrass/white clover pastures were studied at two sites in south-western Victoria, Australia. Nitrogen fertilizer (0, 15, 25, 30, 45 and 60 kg ha–1 ) was applied as urea in mid-April, early May, mid-May, early June and mid-June 1996 to pastures grazed by dairy cows. At Site 1, N fertilizer resulted in a linear increase in P, K, S, Mg and Cl concentrations in herbage and a linear decrease in Ca concentration. For all times of application, concentrations of P, K, Ca, Mg and Cl in herbage increased by 0·0048, 0·08, −0·010, 0·0013 and 0·053 g kg–1 dry matter (DM) per kg N applied respectively. For S concentration, maximum responses occurred in mid-May (0·012 g kg–1 DM per kg N applied). At Site 2, N fertilizer resulted in a linear increase in P, S and Na concentrations in herbage, a linear decrease in Ca concentration and a curvilinear increase in K and Cl concentration. The maximum responses for P, S and K concentrations in herbage occurred for the N application in mid-June and were 0·015, 0·008 and 0·47 g kg–1 DM per kg N applied respectively. For Cl concentration, the maximum response occurred for the N application in early June and was 0·225 g kg–1 DM per kg N applied. Overall, applications of N fertilizer up to 60 kg ha–1 did not alter herbage mineral concentration to levels that might affect pasture growth or animal health. 相似文献
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Krishna Kumari S Thayumanavan B 《Plant foods for human nutrition (Dordrecht, Netherlands)》1998,53(1):47-56
Scanning electron microscope (SEM) pictures of small millet starch granules showed more large polygonal and few small spherical or polygonal granules. The granules of small millets resembled those of rice starch granules. The size of the starch granules ranged from 0.8–10 m. The size of the granules was larger in barnyard millet and smaller in proso millet. Several granules showed deep indentation caused by protein bodies. SEM of starch isolated from 24 hour-germinated kodo millet showed pitting or pinholes at some points due to the attack of amylases (preferentially on bigger granules). Brabender viscoamylograph studies on small millet starches revealed that the gelatinization temperatures ranged from 75.8 to 84.9 ° C. Barnyard millet possessed lower amylograph viscosity, minimum breakdown, and relative breakdown values when compared to the other small millets. 相似文献