共查询到20条相似文献,搜索用时 203 毫秒
1.
2.
不同光质对水培脱毒马铃薯光合与结薯特性的影响 总被引:1,自引:0,他引:1
以红、蓝、红蓝(7︰1)、红蓝(5︰1)和白光5种光质LED灯作为光源,其中白光为对照,研究光质对水培脱毒马铃薯植株叶片发育、叶片光合性能、叶绿素荧光特性和结薯特性的影响。结果表明,在红蓝光(5︰1)处理条件下,水培马铃薯植株生长前期叶面积系数、叶绿素含量、气孔密度、气孔导度(Gs)均高于其他处理,P_n、Φ_(PSⅡ)、q_P、和ETR等显著高于白光处理,块茎形成和膨大最快。且定植60 d时叶绿素含量下降,P_n和PSⅡ活性中心开放程度显著下降,成熟期提前,微型薯产量和成薯率最高。在单色红光处理下,植株叶面积系数、叶绿素含量、G_s、P_n、F_v/F_o、Φ_(PSⅡ)和q_P下降,NPQ升高,块茎的形成和膨大缓慢,产量最低。在单色蓝光处理下前期叶片生长较快,块茎形成早,但不利于匍匐茎的形成,并引起叶片早衰,制约了块茎产量的提高。基于上述结果,光质调控前期可增加红光比例,诱导匍匐茎形成,后期增加蓝光比例,促进块茎形成和膨大,提高块茎的数量和产量。 相似文献
3.
4.
一、微型薯的特点和种用价值。微型薯是利用茎尖脱毒、组织培养和无土栽培方法,在防蚜虫的条件下生产出来的直径5~15mm,重量1g左右的小种薯。这种小薯属生物技术产品,健康优质,不带主要病毒病、细菌和真菌性病害,种用价值高,具有大种薯的特征特性。可以在田间直播,每667m^2地播种量7.5kg,比用大种薯减少用量95%以上,出苗率可达100%,用微型薯生产的原种667m^2产量可达2000~3000kg。微型种薯比同一品种的大种薯休眠期长一倍以上,打破休眠的种薯,播后才能正常发芽生长。 相似文献
5.
《中国瓜菜》2021,(7)
为了探究LED光源在马铃薯微型薯日光温室繁育中的作用,以马铃薯脱毒试管苗克新13号为试材,以温室内自然光照为对照,利用LED混合光源绿光∶蓝光∶红光=1∶1∶3对脱毒试管苗进行补光,研究现代化全光温室中LED光源补光对微型薯结薯特性的影响。结果表明,LED光源补光后微型薯的结薯数量和总质量分别提高了10.0%和14.4%;除了0~10 g级别的微型薯外,其他级别微型薯的结薯总数量和结薯总质量均有所提高。综上所述,LED混合光源绿光∶蓝光∶红光=1∶1∶3处理可以增加日光温室微型薯生产的数量和质量,LED人工补光条件下11~20 g、21~30 g、31~40 g各级别微型薯质量和微型薯数量分别为对照条件下的1.1、1.7、2.4倍和1.3、1.6、2.4倍,这将为马铃薯微型薯日光温室生产中补充光源的选择提供参考。 相似文献
6.
组织培养是当代生物研究中的一项基本技术,而马铃薯微型脱毒种薯是生物技术与无土栽培技术相结合的产物。它利用优良品种的脱毒苗密植来生产个数多、无病毒、单薯重约1克的微型薯块。微型脱毒薯的生产不受季节限制,可工厂化周年生产,比 相似文献
7.
8.
9.
10.
11.
研究了气雾培、水培和基质栽培3种无土栽培方式对上海青生长量的影响。试验结果表明,生长初期,3种栽培方式下,上海青生长量差异不大;而在生长中后期,水培的上海青叶面积、单株质量等指标明显较优,且水培运转成本相对较低,适宜于大面积推广。 相似文献
12.
13.
相比较其他培育方式,马铃薯雾培在成本、产量及品质方面具有显著优势,近年来被大范围用来生产马铃薯原原种。在不同的营养方式及管理方式下,雾培马铃薯的生长势、产量及品质都有很大差异。本文总结了目前马铃薯原原种雾培系统中的主要营养方式及管理方式,提出了有待解决的问题与展望,旨在为科学指导雾培生产马铃薯原原种提供参考。 相似文献
14.
Andrew M. Beacham Laura H. Vickers James M. Monaghan 《The Journal of Horticultural Science and Biotechnology》2019,94(3):277-283
Pressure on agricultural land from a rising global population is necessitating the maximisation of food production per unit area of cultivation. Attention is increasingly turning to Vertical Farming (VF) approaches in an attempt to provide a greater crop yield per square meter of land. However, this term has been used to cover a broad range of approaches, from personal- or community-scale vegetable and herb growing to vast skyscrapers for commercial production of a wide range of crops. This article summarises the main categories of VF in order to help clarify this emerging but sometimes confusing area of agriculture and discusses how scientific investigation of the potential of VF is currently lacking and will be required to help determine its feasibility as a method to assist meaningfully in global food production. 相似文献
15.
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
16.
This research was carried out to determine the effects of different nutrient solution formulations on the growth of nursery fig trees in substrate culture, which is one of the soil-less culture techniques. The hardwood cuttings of Ficus carica L. cv. “Sar?lop” (Calimyrna) were planted into pots filled with 13 L of perlite. Five different nutrient solution formulations were tested on the quality and growth progress of nursery fig trees. The trials were conducted in two different growing conditions, namely, high-tunnel and open-field conditions in substrate culture. To observe the effect of different nutrient solution formulations on nursery fig trees, some morphological and biochemical characteristics were determined. It was concluded that the use of Hewitt's and Hoagland's nutrient solution formulations led to increased growth of nursery fig trees in high-tunnel and open-field conditions, respectively. 相似文献
17.
18.
19.
20.