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国家制定“十一五”规划后,在机遇与挑战面前,我国枣业迎来史无前例的发展机遇。在枣业内部结构调整中,鲜枣生产是枣业发展中的热点,大果形特色鲜枣是热点中的新亮点。鲜枣栽培面积逐年扩大,山东沾化冬枣已达五十万亩,尤其长江流域及以南地区鲜枣生产发展十分迅速,永川正在建设重庆万亩大枣园。其中,引种北方大果型特色鲜食品种,已显现优势,实现一年两熟,但盲目发展鲜枣及制约鲜枣规模化、商品化生产的问题值得深思。因此,我国名、优、特鲜枣品种如何利用南方天然资源优势和贸易条件,推动鲜枣规模化生产,成为当务之急。 相似文献
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该文通过对沧州市枣园栽培管理、产业发展的调查,发现枣果生产存在缺乏必要支持、栽培管理方法不当等诸多问题,致使红枣果品品质下降,影响沧州枣业健康发展,就其问题提出了相应的合理的解决办法。 相似文献
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大雪枣是一种罕见的种质资源,由普通枣树自然变异而成。具有耐干旱、耐瘠薄、果形大、果质好、营养丰富、耐贮存、投入低、效益高、易管理等特点,既适宜于青石山区,又适宜于砂石山区,可在野生酸枣树上直接换头嫁接,当年嫁接当年结果,是继苹果之后又一发展潜力大、生命力强的果树新品种。山东省蒙阴县从1993年开始发展大雪枣,目前已发展到近2000hm2,嫁接200多万株,初步形成了规模。笔者曾多次报道过蒙阴县发展大雪枣的消息,引起了广大农民朋友的浓厚兴趣,现再把大雪枣的特点及其栽培技术介绍如下。1大雪枣的特点大雪枣是一种特大… 相似文献
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灰枣枣树枣股生育规律的初步观察 总被引:1,自引:0,他引:1
本文探讨了枣树研究中尚未涉及的问题———枣股的生长发育规律。作者通过观察 ,发现影响枣股生长发育的主导因子———股龄等因子及其间的相互关系 ;首次提出枣股龄级的划分依据和标准 ,及对结果的影响 ,为枣树丰产、稳产栽培提供了科学依据。 相似文献
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梨枣枣吊生长与结果习性观察初报 总被引:2,自引:0,他引:2
枣吊是枣树结果的基本单位。我们对嫁接后的第3年幼龄枣树,结合夏季管理,对主枝上新发出的枣头和二次冬季修剪后新发的枣头,按不同的用途和要求进行了摘心,发现摘心后的枣头上及二次枝上长出的枣吊生长较快,长度和粗度均大于已形成枣股上发出的脱落性枣吊,且叶片肥... 相似文献
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W. Zhang P. Ahanbieke B. J. Wang W. L. Xu L. H. Li P. Christie L. Li 《Agroforestry Systems》2013,87(4):929-939
Even though agronomists have considered the spatial root distribution of plants to be important for interspecific interactions in agricultural intercropping, few experimental studies have quantified patterns of root distribution and their impacts on interspecific interactions in agroforestry systems. A field experiment was conducted to investigate the relationship between root distribution and interspecific interactions between intercropped jujube tree (Zizyphus jujuba Mill.) and wheat (Triticum aestivum Linn.) in Hetian, south Xinjiang province, northwest China. Roots were sampled by auger in 2-, 4- and 6-year-old jujube tree/wheat intercropping and in sole wheat and 2-, 4- and 6-year-old sole jujube down to 100 cm depth in the soil profile. The roots of both intercropped wheat and jujube had less root length density (RLD) at all soil depths than those of sole wheat and jujube trees. The RLD of 6-year-old jujube intercropped with wheat at different soil depths was influenced by intercropping to a smaller extent than in other jujube/wheat intercropping combinations. 6-year-old jujube exhibited a stronger negative effect on the productivity of wheat than did 2- or 4-year-old jujube and there was less effect on productivity of jujube in the 6-year-old system than in the 2- or 4-year-old jujube trees grown in monoculture. These findings may partly explain the interspecific competition effects in jujube tree/wheat agroforestry systems. 相似文献
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B. J. Wang W. Zhang P. Ahanbieke Y. W. Gan W. L. Xu L. H. Li P. Christie L. Li 《Agroforestry Systems》2014,88(5):835-850
A field study was conducted at Hetian, southern Xinjiang, northwest China, to investigate root morphology as affected by interspecific interactions between jujube (Ziziphus jujuba Mill.) and wheat (Triticum aestivum L.). The treatments comprised (1) sole wheat, (2) 3-, 5- and 7-year-old sole jujube trees, and (3) intercropping of wheat/3-, 5- and 7-year-old jujube trees. Roots were sampled by auger in each plot down to 100 cm depth at 20 cm intervals in the soil profile and horizontally up to 150 cm away from the base of the trees at 30 cm intervals. All jujube/wheat intercropping systems had advantages of intercropping with a land equivalent ratio (LER) >1. There were significant differences in the contours of both root length density (RLD) and root diameter (RD) in intercropped wheat and jujube in the vertical and horizontal direction at corresponding soil depths but the RLD and RD of the 7-year-old jujube/wheat intercropping system were less influenced by intercropping in this respect than 3- and 5-year-old jujube intercropped with wheat. The roots of both intercropped wheat and jujube had smaller RLD, RD and larger specific root lengths (SRLs) at corresponding soil depths than did sole wheat and jujube. The older the jujube the larger were the SRL values of intercropped wheat and the smaller the RLD and RD of intercropped wheat. The greater the distance from the jujube the less influence there was on the RLD, SRL and RD of intercropped wheat and jujube and the greater the distance from the jujube the smaller was the SRL of intercropped wheat and the greater the RLD and RD of intercropped wheat (but still less than the monoculture wheat). The older the jujube the more developed were the jujube roots so that the smaller the SRL of jujube the bigger the RLD and RD of jujube. Jujube tree roots showed a mainly downward trend and extended laterally 150 cm from the trees resulting in the roots of the jujube trees and the wheat having niche overlap at a soil depth of 20–40 cm. The mechanisms underlying the thinner roots of wheat and jujube require further investigation. 相似文献
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研究锌素水平对红枣的品质影响。从红枣果实发育期至采收期,每隔15天在树体进行锌浓度处理后,3天后在不同方位采样,以不喷施锌素为对照,研究阿克苏骏枣果实生长发育时期,果实品质指标的变化过程。结果表明,采收期时,0.05%浓度锌处理可使红枣类黄酮含量达到4.77 mg/kg;0.10%浓度锌处理使红枣可溶性糖和还原糖含量分别达到38.25%和14.55%;0.15%浓度锌处理使红枣蛋白质、Vc含量达到0.69 g/kg和2.28 mg/kg;0.20%浓度锌处理使红枣花青素含量达到0.014 mg/g,0.30%浓度锌处理使红枣总酚含量达到0.093 mg/g。锌处理对红枣果实发育过程中的品质变化有较为显著的促进作用。 相似文献
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