共查询到19条相似文献,搜索用时 109 毫秒
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为探究如何有效保护本土野生羊茅及用作草坪草后如何有效地改进其劣势、发挥其优势,本实验以呼和浩特市本土野生羊茅(Native Festuca ovina L.)和引进羊茅品种‘猎狗5号’为材料,在环境适应性假说和空间异质化假说的不同修剪频率处理下,统计其辛普森指数并测定其生理生化指标的变化,得出不同处理因子对本土野生羊茅与引进羊茅品种竞争、生存能力的影响。结果表明野生羊茅有较好的抗寒性,可以考虑将其用作草坪草育种方向的研究进行改良优化,尝试作为呼和浩特市草坪草,但因其是野生品种,没有进行改良,其坪用性和耐修剪性能较差,所以后续应着重进行此方面的改良。 相似文献
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呼和浩特市草坪草的主要病害 总被引:4,自引:0,他引:4
呼和浩特市草坪发生的病害主要有枯萎病、叶斑病、叶锈病、危害最重的是枯萎病,该病导致草坪草枯黄,形成大小不等的秃斑,发病初期喷施代森锰锌与多菌灵混合液或用代森锰锌均治效果明显;叶斑病的发病率较高,不同草种和品种都有感染,虽然影响草坪草的生长,但不致植株死亡;叶锈病仅见于多年生黑麦草。 相似文献
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呼和浩特市草坪草病害病原鉴定及其防治 总被引:2,自引:0,他引:2
对呼和浩特市草坪草病害进行了调查研究,鉴定出病原真菌16种。其中主要病原真菌6种,对主要病原菌的特征进行了描述,同时对草坪草病害防治提出了具体建议。 相似文献
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草坪草抗寒性研究进展 总被引:1,自引:0,他引:1
本文综述了草坪草形态特征和生长特性与抗寒性的关系,草坪草抗寒生理反应及抗寒生理机制研究进展,草坪草抗寒性的鉴定研究方法及提高草坪草抗寒性的措施,提出了今后进行草坪草抗寒性研究的趋势和建议。 相似文献
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草坪草逆境生理研究进展 总被引:30,自引:17,他引:30
对近年来草坪草逆境生理研究进行了综述。逆境下草坪草光合速率和光化学效率(Fv/Fm)降低,生长受抑制,草坪质量下降;保护酶活性降低,导致膜脂过氧化,细胞膜受伤害;耐逆性强的草坪草品种能维持较高的保护酶活性,因而受逆境的伤害较小。ABA(脱落酸)、细胞分裂素、Ca^2 以及逆境锻炼等能提高草坪草的抗逆性。 相似文献
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草坪草抗盐性研究进展 总被引:25,自引:4,他引:21
简要介绍了草坪草发生盐胁迫的机理 ;盐胁迫对草坪草种子萌发、生长以及体内离子平衡和有机物积累的影响 ;草坪草的抗盐机理及草坪草耐盐性评定方法。提出了减轻草坪草盐胁迫的方法 相似文献
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Plant-soil variation related to perennial-plant resource islands (coppices) interspersed with relatively bare interspaces is a major source of heterogeneity in desert rangelands. Our objective was to determine how native and exotic grasses vary on coppice mounds and interspaces (microsites) in unburned and burned sites and underlying factors that contribute to the variation in sagebrush-steppe rangelands of the Idaho National Lab, where interspaces typically have abiotic crusts. We asked how the exotic cheatgrass (Bromus tectorum L.) and native bluebunch wheatgrass (Pseudoroegneria spicata [Pursh] A. Löve) were distributed among the microsites and measured their abundances in three replicate wildfires and nearby unburned areas. We conducted a common-garden study in which soil cores from each burned microsite type were planted with seed of either species to determine microsite effects on establishment and growth of native and exotic grasses. We assessed soil physical properties in the common-garden study to determine the intrinsic properties of each microsite surface and the retention of microsite soil differences following transfer of soils to the garden, to plant growth, and to wetting/drying cycles. In the field study, only bluebunch wheatgrass density was greater on coppice mounds than interspaces, in both unburned and burned areas. In the common-garden experiment, there were microsite differences in soil physical properties, particularly in crust hardness and its relationship to moisture, but soil properties were unaffected by plant growth. Also in the experiment, both species had equal densities yet greater dry mass production on coppice-mound soils compared to interspace soils, suggesting microsite differences in growth but not establishment (likely related to crust weakening resulting from watering). Coppice-interspace patterning and specifically native-herb recovery on coppices is likely important for postfire resistance of this rangeland to cheatgrass. 相似文献
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不同草坪草体内类胡萝卜素含量的比较 总被引:5,自引:2,他引:3
用高效液相色谱仪,配以Waters Spherisorb(ODS-2封口的色谱柱,测定正常光照条件下沿阶草(Festuca arundinacea Schreb.)、高羊茅(Poapratensis L.)和草地早熟禾(Ophiopogon bodinieri Lévl.)体内类胡萝卜素的相对含量和构成.结果表明:主要类胡萝卜素按其在植物体内的含量多少排序为叶黄素>β-胡萝卜素≥紫黄质>新黄质;由于不同植物的类胡萝卜素/叶绿素的比值不同,所有类胡萝卜素均以其在整个类胡萝卜素中所占的比值的不同来衡量种间的差异;3种植物中的新黄质和β-胡萝卜素的含量没有明显差异;叶黄素与叶黄素库(包括紫黄质、单环氧玉米黄质和玉米黄质)呈明显的负相关关系,沿阶草叶黄素/叶黄素库的比值最高,而草地早熟禾和高羊茅之间没有明显差异;β-胡萝卜素及其衍生物(叶黄素库和新黄质)与α-胡萝卜素及其衍生物(叶黄素)的比值,在3种植物中具有显著差异,以草地早熟禾为最高,而沿阶草最低. 相似文献
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草坪草种子活力的低温保存试验 总被引:6,自引:0,他引:6
用-30℃、-10℃、5℃和室内20~28℃(对照)对草地早熟禾、紫羊茅、高羊茅、剪股颖四种草坪草种子保存200d后分析得出,各草坪草种子要求冷藏温度不一样,恰当的低温保存可以保持原种子活力。草地早熟禾和剪股颖种子在-30℃~-10℃保存为好,紫羊茅以-30℃为佳,而高羊茅在200d内无需冷藏。 相似文献
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沟叶结缕草定量灌溉方法 总被引:5,自引:0,他引:5
以沟叶结缕草为例,推荐一种有效定量灌水方法。根据草坪质量与土壤含水量、土壤水势的相关性及作物系数、蒸发量等参数,准确计量其灌水时间、灌水量和灌水频率。 相似文献
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对四种草坪草种子进行了萌发特性测定及预萌发和镇压对建坪影响。结果表明 :四种草坪草幼苗的生活力强弱依次为意大利黑麦草 >紫羊茅 >高狐茅 >亨特草地早熟禾 ;预萌发与直播在出苗率、生物量和枝条数上都表现出显著差异 (P≤ 0 .0 5 ) ,镇压与不镇压差异不显著 (P≥ 0 .0 5 )。采用预萌发技术建植草坪有利于提高建坪速度和建坪质量。 相似文献
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《Strength and Conditioning Journal》2020,73(6):756-759
Approaches and techniques for control of exotic annual grasses are a high priority in rangelands including sagebrush steppe. Strains of the soil bacterium Pseudomonas fluorescens have been proposed to be selectively pathogenic to multiple species of exotic annual grasses (“Pf,” weed-suppressive bacteria, “WSB”). However, defensible tests of the target and nontarget effects of these WSB strains in the field are needed. We evaluated the effects of D7 and MB906 strains of Pf WSB in sagebrush steppe invaded by cheatgrass (Bromus tectorum L), medusahead (Taeniatherum caput-medusae L. Nevski), and other exotic annual grasses. We evaluated the WSB strains with and without herbicides (imazapic, rimsulfuron) or discing to mix surface-spray of the WSB into deeper soils, and we replicated these tests in three ecoregions that differed in soils and climate. Over 3 yr after treatment, neither WSB strain affected cover of exotic annual grasses, perennial bunchgrasses, or the total community, either with WSB alone or in combination with herbicides or discing. WSB has received considerable attention and is being applied across large rangeland areas, but the WSB strains and methods applied here were ineffective. We recommend any future use of WSB be applied in an experimental fashion, with experimental design and measurement of responses, until its effects can be proven. 相似文献