Results 41 to 50 of about 6,941 (192)
Shuitu Baochi Xuebao, 2008 考察了三峡库区嘉陵江岸5种耐水淹植物的根系在土壤表层(0-30 cm)的分布特征,从抗冲性和抗蚀性两个方面明确了它们对土壤抗侵蚀的增强效能,并对其根长密度(RLD,root length density)进行了分析。研究发现:(1)狗牙根、空心莲子草、牛鞭草和野古草的根系生物量主要分布在土壤上表层(0-10 cm),荻根系生物量在土壤表层分布比较均匀;(2)狗牙根、牛鞭草和野古草的RLD及D(直径)≤1 mm RLD在土壤上表层分布较多,荻和空心莲子草的RLD及D≤1 mm RLD在上、中表层(10 ...
XU Shao-jun, ZENG Bo
doaj
New Phytologist, EarlyView.Summary Herbarium specimens are widely distributed in space and time, thereby capturing diverse conditions. We reconstructed specimen ‘lived’ climate from knowledge of germination cues and collection dates for 14 annual species in the Streptanthus (s.l.) clade (Brassicaceae) to ask: which climate attributes best explain specimen phenological stage and ...
Megan Bontrager +6 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 采用原状土冲刷水槽法，以油松林、刺槐林、山杏林、荆条地及荒草地土壤为研究对象，研究了晋西黄土残塬沟壑区蔡家川流域不同植被类型土壤抗冲性能及植物根系对土壤抗冲性的影响。结果表明：（1）在原状土冲刷试验过程中，各植被类型径流量随冲刷时间的变化趋势不明显，含沙量随时间延长先减少后趋于平稳，土壤抗冲指数呈逐渐增加的趋势。（2）各植被类型总根长密度、根表面积密度、根体积密度及根生物量密度均表现为刺槐、油松林地较大，山杏、荆条、荒草地较小且相差不大，总根系参数之间均存在正相关关系。各植被类型不同根径范围（0~0.5，
金晓, 陈丽华
doaj
Adaptive Root of Mangrove Plant Avicennia marina: Structure and Transcriptome Analyses [PDF]
, 2017 红树林泛指生长在热带、亚热带地区河口或海岸潮间带的木本植物群落，是适应陆地与海洋过渡区域的一种特殊森林类型。白骨壤（Avicenniamarina）是红树林中常见的红树植物，是群落演替中的先锋物种。对于生长在滨海湿地相对低氧环境的白骨壤而言，其根系统对湿地环境有高度专业化的适应。根据白骨壤根结构生长位置和生长方向不同，将其分为四种根结构，分别为在地面下方水平生长且围绕树干延伸数米的水平根（Cableroot）、垂直于水平根向地下生长的锚定根（Anchorroot ...
郝赛琦
core
Strategies of high efficiency water usage promoted by microbial remediation in coal mining areas of western China [PDF]
The fragile ecological environment in the western coal mining areas of China, compounded by intensive mining activities, has led to water and soil erosion, soil degradation, and damaged root systems.
Chao WU +4 more
core +1 more source
New Phytologist, EarlyView.Summary Evidence for the ongoing biodiversity crisis rests on assessment of a small fraction of described species, with major knowledge gaps for most organisms, including plants. Here, we highlight how digitised herbarium specimens can be used to accelerate and improve estimates of recent and ongoing plant extinctions.
Aelys M. Humphreys +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2018 为了推进根系固土机制的定量研究，在前期边坡调查和植物筛选的基础上，人工种植了百喜草、假俭草、狗牙根3种常见的护坡植物，根据各深度下原状根-土复合体干密度、含水率和质量含根量等物理性质指标，设计了重塑根-土复合体直剪试验方案，实施了3种植物原状和重塑根-土复合体的直剪试验。结果表明：3种原状根-土复合体的抗剪强度在各级法向压力作用下均随含根量的增加而逐渐增大；3种原状根-土复合体的黏聚力和内摩擦角均随深度的增加而减小；3种植物根系在相同的土体状态下对黏聚力的影响排序为狗牙根＞百喜草＞假俭草 ...
陈 +5 more
doaj
Shuitu Baochi Xuebao, 2021 伴随气候变化下亚热带地区米槠天然林净初级生产力变化，凋落物以及植物根系输入亦会发生改变，这将显著影响土壤微生物群落。于2019年7月在设置7年的米槠天然林植物残体添加和去除试验（the detritus input and removal treatments，DIRT）样地采集不同处理（对照、去除地上凋落物、去除地下根系、无凋落物输入、添加双倍地上凋落物）的2个土层土壤（0—10，10—20 cm），测定微生物磷脂脂肪酸（phospholipid fatty acid，PLFA）含量 ...
张磊 +6 more
doaj
New Phytologist, EarlyView.Summary Under a changing climate, it is imperative that we understand how species may respond to temperature impacts, which can differ among populations of the same species due to local drivers. Thermal tolerance data, which can be used to assess an organism's upper thermal limits, is valuable to identify species and/or populations' susceptibility to ...
Nicole Said +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 植物根系是植物与土壤进行物质交换的通道，在土壤侵蚀严重、生态脆弱的黄土丘陵区，深入认识根系对土壤物理化学性质的影响具有重要意义。选取了白羊草（Bothriochloa ischaemum）、苔草（Carex lanceolata）、茭蒿（Artemisia leucophylla）、铁杆蒿（Artemisia sacrorum）、狼牙刺（Sophora viciifolia）、柠条（Caragana intermedia）6种植物作为研究对象，取0-10，10-20，20-30，30-40，40-50 ...
赵富王, 王宁, 苏雪萌, 李秋嘉
doaj