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库尔勒地区加大绿化建设力度,应用大量的花灌木,如榆叶梅、连翘、珍珠梅、丁香等.在修剪各类花灌木之前,首先应了解其生长习性,按其自然生长规律,适时合理修剪.通过工作实践,总结库尔勒地区几种常见花灌木的整形与修剪技术. 相似文献
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不同灌水量对三种园林植物生长的影响 总被引:1,自引:0,他引:1
以2a生的臭柏、榆叶梅、山桃为试材,采用盆栽法,将土壤水分梯度分为4个处理等级(即各处理土壤含水量基本保持在田间持水量的15%~25%(T1)、35%~45%(T2)、55%~65%(T3)和不灌水仅靠天然降雨(CK)),分析不同灌水条件对3种园林植物苗木生长的影响。结果表明:3种植物各处理下的生物量均比对照组有所增加,在T3处理时生物量达到最大值,即臭柏为895.28g、山桃为492.01g、榆叶梅为421.86g。各处理条件下臭柏根冠比均无显著性差异;山桃根冠比大小为:CKT1T2T3;榆叶梅根冠比除对照外,随着灌水量的增加而显著减小。3种植物的株高和地径增量随灌水量的增加而增大;并且都在T3处理下增大最为显著。经综合评价,3种园林植物的抗旱能力大小为:臭柏山桃榆叶梅。土壤水分控制在田间最大持水量的55%~65%有利于3种植物的生长,其生物量、地径和株高增加普遍显著好于其它处理,有利于在干旱环境下保持正常生长,为3种园林植物的节水和栽培提供了参考。 相似文献
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M. K. Ernst G. Bufler M. Röske M. Ritzkowski C. Metzger H.-P. Liebig 《The Journal of Horticultural Science and Biotechnology》2013,88(5):588-593
SummaryThe effect of cultivar and temperature on the temporal pattern of starch occurrence in the primary thickening meristem (PTM) of onion (Allium cepa L. var. cepa) bulbs was studied. Bulbs of four cultivars differing in their sprouting behaviour in dry storage were analysed during bulb development for the concentration of starch in the PTM and inner sprout growth by histochemical analysis and determination of leaf ratio, respectively. Generally, in all cultivars the concentration of starch in the PTM was high during active growth, decreased to a low value during sprout dormancy, and increased before or concomitant with inner sprouting. The duration of the low starch period varied between cultivars. If onions were stored at low (18C), intermediate (158C), or high (308C) temperature, inner sprouting was delayed at low and high temperature compared with the intermediate temperature, whereas starch increased before sprouting at low and intermediate temperature, but became undetectable at high temperature. Moreover, if benzyladenine was injected into onions stored at high temperature, sprouting was readily induced, but starch in the PTM remained undetectable and no root initiation occurred. Since the PTM is not only responsible for the stem thickening but also for root initiation we conclude (i) that low starch in the PTM primarily indicates root dormancy and only indirectly sprout dormancy, and (ii) that high temperature-imposed sprout dormancy is actually based on root dormancy. 相似文献
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通过对冲国李品种不同部位的同工酶(过氧化物酶POD、超过氧化物歧化酶SOD)的研究证明:停止伸长生长的一年生新梢上叶片、叶柄、枝皮同工酶谱相对稳定,是理想的同工酶试验取样部位。 相似文献
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以‘特选一号’甜瓜为接穗,‘银光’南瓜为砧木,采用了顶插接、改良插接、断根插接和断根贴接4种嫁接方法,研究了不同嫁接方法对甜瓜嫁接苗生长的影响,以期为甜瓜育苗提供指导。结果表明:甜瓜顶插接嫁接速率最快、嫁接工效最高,嫁接后在昼/夜温度为28℃/18℃条件下,改良插接的嫁接成活率最高,改良插接和断根贴接的愈合时间短。在一叶一心时期,改良插接和顶插接的嫁接苗有明显的生长优势,改良插接的嫁接苗根系生长最好;而到三叶一心时期,断根插接和断根贴接的甜瓜嫁接苗生长快,壮苗指数显著高于顶插接和改良插接,断根插接的嫁接苗叶面积最大。不同嫁接方法所需除萌蘖次数和时间也存在差异,断根插接除萌蘖次数最少,除萌蘖用时仅为顶插接的46.3%。 相似文献
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Effects of treatments with gibberellic acid (GA3, 50 mg L−1 for 2 h) or carbon disulphide (CS2, 25 ml m−3 for four days) on breaking of dormancy and sprouting of potato (Solanum tuberosum L., cvs Agria and Marfona) minitubers of different weight classes (0.3, 0.7 and 1.5 g) were investigated. The dormancy period tended to decrease with an increase in the weight of minitubers, whereas the number of sprouts per minituber, their length and fresh weight and the sprout mass per unit of sprout length of the longest sprout tended to increase with an increase in minituber weight. In both cultivars, applying GA3 or CS2 advanced breaking of dormancy, but GA3 was less effective in Marfona than in Agria. Advancing breaking of dormancy was associated with removal of apical dominance and therefore applying GA3 or CS2 also increased the number of sprouts per minituber, especially in Agria. In Agria, the dry matter content of sprouts from the CS2 treatment was higher than in the GA3 or control treatments, whereas in Marfona dry matter content of sprouts was highest in the GA3 treatment. The length of sprouts, fresh weight of sprouts and the sprout mass per unit of sprout length of the longest sprout were significantly enhanced by treating minitubers with GA3 or CS2 compared with the untreated control minitubers, but there were strong interactions with cultivar and minituber weight. These interactions are important in practical use of dormancy breaking methods. 相似文献
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以3年生"中秋王"苹果1年生枝条为试材,设置全刻芽(T1)、基部刻芽(T2)、中部刻芽(T3)、上部刻芽(T4)4种刻芽方式,以不做刻芽处理的枝条为对照(CK),研究不同刻芽处理对"中秋王"苹果枝条萌芽成枝的影响,以期筛选"中秋王"苹果适宜的刻芽促枝方式,为"中秋王"苹果生产中刻芽促枝尽快成形提供参考依据。结果表明:刻芽处理可显著提高苹果枝条萌芽率、成枝力(P<0.05),枝条萌芽率与成枝力呈极显著正相关关系(P<0.01),与短枝率呈显著负相关关系(P<0.05),与长枝率呈显著正相关关系(P<0.05)。对"中秋王"苹果进行刻芽处理对树体枝条萌芽率、成枝力、枝类组成作用显著。从改善苹果萌芽成枝、整形效果以及省工省力等方面综合分析认为,最适刻芽方式为中部刻芽。 相似文献