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文章通过对97个核桃种质开花结实习性、植株产量、坚果品质等分析测定认为,云南核桃种质资源极为丰富,其花型、结实期、成熟期、坚果三径值、出仁率等均有很大差异,为选择优良类型和杂交亲本提供了条件。通过对97个种质综合分析评价认为:云南泡核桃、三台核桃、细香核桃三个品质优良,是云南核桃的主裁品种,可大力发展。丽3号、杂交14号等9个优良可在生产上推广应用;弥渡纸皮核桃等可作早熟品种;铁核桃和野核桃是优良品种核桃栽培品种的砧木和育种材料。 相似文献
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文章通过对97个核桃种质开花结实习性、植株产量、坚果品质等分析测定认为,云南核桃种质资源极为丰富,其花型、结实期、成熟期、坚果三径值、出仁率等均有很大差异,为选择优良类型和杂交亲本提供了条件。通过对97个种质综合分析评价认为:云南泡核桃、三台核桃、细香核桃三个品质优良,是云南核桃的主裁品种,可大力发展。丽3号、杂交14号等9个优良可在生产上推广应用;弥渡纸皮核桃等可作早熟品种;铁核桃和野核桃是优良品种核桃栽培品种的砧木和育种材料。 相似文献
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核桃是绥中县乃至我国的主要经济林树种。核桃的新品种选育和开发是促进核桃产业发展的重要因素。为了培育优质、丰产、抗逆性强的核桃新品种,绥中县水口林场经过多年的研究,于2014年选育出了水口2号核桃新品种。水口2号核桃树势中庸健壮,树姿开张,品种丰产稳产,坚果品质优良,可在绥中县周边地区如建昌、凌源等地普遍种植。 相似文献
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东部黑核桃(Juglans.nigra)在美国的栽培利用概况 总被引:6,自引:1,他引:5
东部黑核桃(Juglans.nigra)在美国是一分布广泛、适应性强、经济价值很高的树种。黑核桃木材优良、果仁营养价值高,因此可果材兼用。文中简要介绍了黑核桃的生物学特性、面积、分布;木材生产、利用和出口;坚果生产和加工利用;黑核桃的科研及推广;黑核桃在农用林业中的应用等。 相似文献
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早实核桃新品种引种试验研究 总被引:1,自引:1,他引:1
采用大树多头高接的引种方法,对引进35个早实核桃新品种(或优系)的适应性、生长结实特性和坚果品质进行了连续观察和测定,并依据国家标准GB7907—87(核桃丰产与坚果品质)中有关核桃新品种的经济指标和适应性,采用独立淘汰方法,分层进行了评定,初步选出适合于山西省发展12个品种,这些品种的主要经济性状均达到或超过美国2个最新专利品种。 相似文献
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David Brauer Adrian Ares William Reid Andrew Thomas John P. Slusher 《Agroforestry Systems》2006,67(1):63-72
Many landowners in the United States have little knowledge of the potential economic returns from agroforestry practices.
Economic simulators for temperate agroforestry practices have been generated; yet, there are few data sets on yields of timber
and other products to validate and refine such models. The objectives of this study were to characterize variations in nut
yields among open canopy eastern black walnut (Juglans nigra L.) trees and apply this information to the development of predictive equations between tree diameter at breast height (DBH)
and nut yields. Three data sets were analyzed that included results from Tennessee; Chetopa, Kansas; and Mt Vernon, Missouri.
Tree-to-tree variation in nut yields was high within each data set, with coefficients of variation for nut yields typically
exceeding 50%. Averaging nut yields over several consecutive years reduced coefficients of variation. Nearly half of the high
nut producing trees exhibited an alternate, biennial nut bearing pattern. Trees with low average nut yields had either sporadic
or irregular patterns of nut bearing. The regression coefficients for equations relating stem diameter and nut yields varied
considerably. Averaging nut yields over consecutive years, and averaging stem diameter and nut yields over a number of trees
increased regression coefficients of such equations. These results indicate that predicting nut yields of a tree stand over
a several year-period will be easier than predicting yields for a specific tree in a specific year.
Deceased 2002 相似文献
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云南核桃的特性与品质 总被引:7,自引:0,他引:7
为了进一步研究云南核桃的特点,阐述了云南核桃(或称为铁核桃,也即深纹核桃)Juglanssiggillata L.的起源、栽培历史和分布区的自然生态条件、生长特性、栽培模式与品质特点.认为云南核桃和普通核桃Juglans regia L.具有明显的差异;铁核桃抗性强,适宜于云南栽培,是云南发展核桃产业的种质基础;应进一步加强良种选育工作,创新栽培技术,在充分评价品种品质特性的前提下,开展果用,仁用、油用定向培育工作,这是云南核桃产业的发展方向. 相似文献
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三台核桃的开花习性观察 总被引:2,自引:0,他引:2
对70株三台核桃开花习性的观测表明:三台核桃完成整个开花过程(包括雌雄花),历时47d,但品种不同、树龄不同,花期各异;具有明显的雌雄花早熟现象,尚未看到雌雄同熟品种;开花与气象因子的关系密切;落花高峰期一般出现在4月7日-20日之间,落(雌)花率为3.0%-94.2%,但落(雌)花率因品种而异。 相似文献
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Nitrogen fertilization and aspects of fruit yield in a Missouri black walnut alley cropping practice
Increasing nut production through cultural practices is important to landowners for maximizing economic gain from agroforestry
plantings. This project studied the effects of applying low rates of nitrogen (N) fertilizer during either the spring or late
summer, on pistillate flowers formed, fruits retained, and fruit quality (percentage kernel) in black walnut (Juglans nigra
L.) grown under alley cropping management. Treatments consisted of two forms of nitrogen fertilizers (NH4NO3 and NaNO3) applied in mid-April, or mid-August of 1995 and 1996, and a nonfertilized control group. Pistillate flowers counted in May,
1996, showed that fertilized trees, regardless of timing or form of N applied, produced from 2.3 to 3.4 times the number of
pistillate flowers as unfertilized control trees. Through the season, the fertilized trees had greater fruit retention, and
ended with 2.9 to 4.8 times more walnuts (on a whole tree basis) than nonfertilized control trees. In addition, all fertilizer
treatments resulted in increased nut yields from 1995 to 1996, while unfertilized control tree yields decreased approximately
70%. Summer application of fertilizer showed the greatest benefit to kernel weight. Average kernel weights of nuts from the
summer-fertilized trees increased from 1995 to 1996, while kernel weight averages from spring-fertilized and nonfertilized
trees remained unchanged or decreased.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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薄麻壳泡核桃是贵州主要农家品种,数量分布广,具有壳薄、取仁易、味香等特点。对薄麻壳泡核桃开展优良单株选择,拟为核桃苗木生产提供优良繁殖材料,为选育核桃优质农家品种提供技术支撑和遗传材料。2015年以来,对贵州省薄麻壳泡核桃进行选优调查,按照丰产性状和坚果品质进行初选和复选,应用多性状综合评定开展决选。预选优树30株,复选优树15株,按照国家标准决选优树6株,评选出来的6株优良单株,其单果重变幅为9.54~14.27g,壳厚变幅为0.97~1.30mm,出仁率变幅为50.24%~59.98%,含油率变幅为59.04%~70.67%,蛋白质含量变幅为19%~23.9%。优良单株壳面麻壳,其取仁难易、壳厚、出仁率、仁色等方面具有良好表现。 相似文献