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优质抗病水稻新品种粤农丝苗的选育及应用 总被引:3,自引:0,他引:3
粤农丝苗是广东省农科院水稻研究所近年育成的优质抗病常规水稻新品种。该品种丰产性较好,广东省区试初试和复试平均产量分别为420.72 kg/667 m2、437.82 kg/667 m2,均比对照显著或极显著增产,米质达国标优质2级,高抗稻瘟病、中抗白叶枯病,株型紧凑、抗倒性强、后期熟色好。2011年通过广东省审定,2012-2013年成为广州市主导品种,在广东省累计推广9 200 hm2。 相似文献
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优质常规稻新品种新源占的选育及特征特性 总被引:5,自引:0,他引:5
新源占是广东省佛山市农业科学研究所用新山软占/早源籼选育而成的优质常规稻新品种,2012年6月通过广东省农作物品种审定委员会审定。2010年、2011年晚季参加广东省水稻区试,平均单产为432.5kg/667m2和437.0kg/667m2,比对照优优122分别增产7.46%、10.96%,均增产极显著,丰产性突出;米质晚季鉴定为国标优质2级和省标优质2级;中抗稻瘟病,大田生产及试验纹枯病均为轻。本文介绍了新源占的选育过程、特征特性及主要栽培技术要点。 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