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荔枝品种结构调整初探 总被引:1,自引:0,他引:1
荔枝是南国佳果,主要栽培于广东、广西、福建、台湾、海南及四川等省区。近十多年来,主产区种植发展很快,但新植的品种结构不尽合理。主要表现在:中熟品种偏多,早、晚熟优质品种偏少,致使鲜果上市时间过于集中,市场压力大,出现增产不增收的现象,严重影响果农的经济收入,因此,调整品种结构势在必行。广东荔枝早、晚成熟期相差近4个月,福建相差只有1个多月,厦门地区相差只有20天。早、晚熟品种没有搭配好,品种结构很不合理,福建地处荔枝栽培的北缘,成熟期要早也早不过海南、广东和广西,发展晚熟优质品种才是福建的区位优… 相似文献
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海南大叶等6个品种形态特征研究 总被引:1,自引:0,他引:1
对海南大叶种、广东黄坑种、广东石潭种、台湾大叶种、云南勐海种、云南双江种等6个品种观测13个性状项目,结果认为:花部性状差异较大的是子房茸毛、萼片长度和花柄长度;叶部性状差异较大的是叶面积、侧脉数和叶背茸毛。以云南双江种为对照,台湾种差异最大,海南大叶介于二者之间。 相似文献
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为期五天的第三届全国荔枝龙眼暨特色农产品交易会于26日在福建厦门落下帷幕,来自福建、广东、广西、海南等地专家学者呼吁,将共建荔枝龙眼优势产业区域。同时,四省(区)农业厅共同制定了《2005—2010年我国荔枝、龙眼优势区域发展规划》,联合签订抵制毒荔枝龙眼协定,并联合向农业部申请实施荔枝、龙眼产业技术升级等项目。本届会议还确定了明年四省(区)荔枝龙眼交易会由广东主办。 相似文献
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国际旅游岛建设上升为国家战略,海南创意农业的发展面临更大的挑战。分析国内部分地区如上海、四川和广东的陈村等地创意农业发展的成功模式,提出发展海南创意农业的对策和建议。挖掘海南创意农业的比较优势,充分利用有利的自然生态条件和资源,在国际旅游岛建设的大背景下,努力开发生产一批具有海南本土特色的创意农业产品品牌,全力打造海南的创意农业。 相似文献
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本文分析了自1987年与海南分省和取消油料征购任务,油价放开以后,广东的花生生产情况和生产潜力,提出了今后发展广东花生生产的主要对策。 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