共查询到20条相似文献,搜索用时 62 毫秒
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杜兰落花生,亦称蔓花生、遍地黄金,原产南美洲,自然分布于阿根廷、巴拉圭、玻利维亚等地,是一种匍匐型、蔓生性热带草本豆科植物[1-2]。杜兰落花生具有较强的耐瘠、耐旱、耐热、耐阴等特性。该品种建植速度快,草被紧贴地面,在热带以及大部分亚热带地区四季常绿,花期长,美观实用,已作为一种新的豆科观赏性草坪草种在我国南方较大面积种植利用。该品种适口性好、营养价值高,也是一种优良的饲草资源。此外,杜兰落花生还有保持水土、改良土壤等优良特性,也是红壤山地和观光果园优良套种植物。1形态学特征杜兰落花生为豆科蝶形花亚科落花生属多年… 相似文献
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马齿苋的利用价值及栽培技术 总被引:7,自引:0,他引:7
马齿苋(Portulaca oleracea L.)为马齿苋科的一年生肉质草本植物,民间又叫马苋、马苋菜、长命菜、酸味菜、长寿菜等.茎圆柱形,自基部分枝,平卧或先端斜上;叶互生或假对生,叶柄极短或近无柄,叶片倒卵形或楔状长圆形,全缘;花无梗,通常3~5朵花簇生于枝顶,苞叶4~5片、膜质,萼片2片;花瓣5个、黄色;蒴果圆锥形,种子肾形、黑褐色;开花期和结果期各90 d.野生种类分布于全国各地,生长于较肥沃而湿润的农田、地边、路旁等处,以菜地最多. 相似文献
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Using the cotyledon of white clover as explants, the transgenic white clover lines ectopic expression of the PhyA gene were established based on Agrobacterium tumefaciens-mediated transformation method. It was found that the tested transgenic lines were all Polymerase Chain Reaction (PCR) positive.
The transgenic lines 1 to 4 were used for further Southern blot and Northern blot analysis. The lines 1 and 3 with higher
level of PhyA expression were used to assay the phytase activities in root and its intercellular space. When the phytate was the sole phosphorus
source, the phytase activities in root in lines 1 and 3 were 31.43% and 44.76% higher than those in control (CK), respectively.
Meanwhile, the phytase activities in the root intercellular space in lines 1 and 3 were 3.3-fold and 5.12-fold higher than
those in CK, respectively. The phosphorus concentration of plants, the accumulative P amount per plant, plant fresh weight,
and plant dry weight were all much higher in lines 1 and 3 than in CK. Thus, it is clearly shown that ectopic expression of
Aspergillus niger PhyA gene could significantly increase the ability for white clover to utilize organic phosphate under inorganic phosphate (Pi)-deficient condition.
Translated from Acta Agronomica Sinica, 2007, 33(2): 250–255 [译自: 作物学报] 相似文献
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三叶草是一种重要的豆科牧草,在土壤改良、水土保持以及生态环境保护方面发挥着积极作用。本文主要从基因工程对三叶草进行改良、培育和三叶草遗传资源保存、利用两方面阐述了生物技术在三叶草研究中的应用,并着重介绍了转基因、体细胞杂交、胚拯救技术。 相似文献
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我国传统的果园耕作制度由于强调清耕除草,导致了果园投入增加,生态退化,地力下降.为加快果园耕作制度的变革,提高果业生产的经济效益、生态效益和社会效益,白银市农技中心生态果园建设项目组把以三叶草作为果园套种的主导草种进行栽培技术研究,现将结果总结如下. 相似文献
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不同比例的黑麦草与白三叶青贮试验 总被引:3,自引:0,他引:3
豆科牧草白三叶与禾本科牧草黑麦草按白三叶黑麦草7030、5050、3565的不同比例混合青贮,30d后采样测定,pH值分别为5.0±0.16、4.4±0.11、4.1±0.13.试验表明,白三叶含量越高pH值越高.仅3565组达到优质青贮饲料的pH值范围.综合外观和适口性评价,7030组、5050组青贮质量明显低于3565组.试验采用供试猪空腹短时间采食量评价饲料的适口性,把适口性指标数量化,利用拉丁方进行试验设计,并对结果进行统计分析.有效剔除供试猪个体及不同时间的实验误差,增加了试验结果的准确性. 相似文献
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Hall DM 《Science (New York, N.Y.)》1967,158(3800):505-506
The application of conventional electron microscopy to the study of plant leaves and fruit readily displays the surface wax deposits, but not the wax pathways from the underlying cells. A modified freeze-etch technique shows both at the same time and indicates that wax is transported from the epidermal cells to the leaf surface in microchannels. 相似文献
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The effect of irrigation regimes, calculated fertilizer rates, and age and varietal characteristics on seed productivity of a red clover crop not traditional for the Lower Volga region is examined. Combinations of the main factors for producing the planned clover seed yield at the 200–800 kg/ha level are determined. 相似文献