Results 51 to 60 of about 5,920 (160)
Shuitu Baochi Xuebao, 2007 利用标准样方法研究了川西最主要的两种退耕还林植被(苦竹林和桦木林)在恢复初期生态系统碳储量、碳素密度以及空间分配特征.结果表明:(1)苦竹不同器官碳素密度为0.348 5～0.518 6 gC/g,桦木不同器官碳素密度为0.451 9～0.513 7 gC/g;(2)苦竹林林下枯落物的碳素密度为0.341 7 gC/g,桦木林林下枯落物的碳素密度为0.395 3 gC/g;(3)不同植物器官的碳储量分配与各器官的生物量显著相关.苦竹林分中竹秆生物量占48.87%,其碳储量占53.06 ...
黄从德, 张健, 邓玉林, 杨万勤
doaj +2 more sources
Ecological Solutions and Evidence, Volume 6, Issue 3, July–September 2025.Over the past three decades, a large number of natural wild soybean populations have been declining inexplicably or even have disappeared and their distribution area has significantly decreased in China, and population losses continue unabated. Therefore, this study investigated 20 herbaceous communities of wild soybeans in various habitats in ...
Ke‐Jing Wang, Xiang‐Hua Li
wiley +1 more source
New Phytologist, Volume 247, Issue 2, Page 504-517, July 2025.Summary Repetitive DNA is a feature of all organisms, ranging from archaea and plants to humans. DNA repeats can be seen both in coding and in noncoding regions of the genome. Due to the recurring nature of the sequences, simple DNA repeats tend to be more prone to errors during replication and repair, resulting in variability in their unit length ...
Sridevi Sureshkumar +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 探讨水地条件下种植模式对夏玉米产量及水分利用的影响，为夏玉米节水种植高产稳产栽培提供依据。以玉米品种"登海685"为试验材料，研究宽垄沟播和等行距平播模式下不同种植密度（6.00，6.75，7.50万株/hm2）对夏玉米生长发育、产量、养分吸收及水分利用率的影响。结果表明：沟播种植模式较平播增加玉米植株株高，使茎粗和单株干物质重降低。沟播模式的穗性状比平播处理较优，单穗重增加，且受种植密度影响较小，表现出明显的边行优势。沟播模式的玉米叶片叶绿素相对含量始终高于平播处理，生育期延长 ...
董飞 +9 more
doaj
Integrative Conservation, Volume 4, Issue 2, Page 231-245, June 2025.Plant order‐level Sankey plot illustrating plant use of ethnolinguistic groups for key disease types based on organ systems and use. Each node represents the strength of its interaction or usage. ABSTRACT Many human populations rely on natural remedies for health and healing, with traditional medicinal plants playing a vital role in diverse ...
Krizler C. Tanalgo +15 more
wiley +1 more source
, 2012 利用盐生植物抑制藻类生长是防治海洋赤潮发生的一种新兴技术.本文以中国近海典型赤潮原因种中肋骨条藻为对象,研究了滩涂盐生植物盐角草对藻生长的影响及其机制,并利用高效液相色谱技术分析潜在的抑藻物质.共培养实验结果显示,在营养盐充足的条件下,盐角草能够显著抑制中肋骨条藻的生长,降低藻生长水体叶绿素A(CHlA)浓度.除盐角草根系水提物之外,其余3种有机相提取物均能抑制藻的生长,改变藻细胞大小,并且影响单个细胞的CHlA含量.各种有机相提取物的抑制作用具有浓度效应,随浓度升高抑制作用增强 ...
匡廷云 +6 more
core
Effectiveness of protected areas in the Caucasus Mountains in preventing rangeland degradation
Conservation Biology, Volume 39, Issue 3, June 2025.Abstract As land use intensifies globally, it increasingly exerts pressure on protected areas. Despite open, nonforested landscapes comprising up to 40% of protected areas globally, assessments have predominately focused on forests, overlooking the major pressures on rangelands from livestock overgrazing and land conversion.
Arash Ghoddousi +12 more
wiley +1 more source
Shuitu Baochi Xuebao, 2021 土壤可溶性氮组分是氮循环中最活跃的一环，是联系"植物—土壤氮组分—土壤养分"的关键纽带。为探讨植被类型对黄土丘陵区土壤氮素累计及其有效性的影响，以黄土丘陵区4种典型植被（荒草地、沙棘林地、文冠果林地、云杉林地）为研究对象，分析0—10，10—20，20—40 cm土层可溶性有机氮（SON）、铵态氮（NH4+—N）、硝态氮（NO3-—N）含量，密度及其所占TN比例在不同植被间的差异。结果表明：与荒草地相比，0—40 cm土层中SON含量整体表现为云杉林地最高（19.0%），文冠果林地和沙棘林地分别减少7 ...
杜佳囝 +6 more
doaj
Inhibitory Effect of Salt Marsh Halophyte Salicornia Europaea on Prorocentrum Donghaiense [PDF]
, 2014 利用植物抑制藻类生长是目前海洋赤潮治理的有效生态手段之一。以东海原甲藻为材料,研究了滩涂盐生植物盐角草对东海原甲藻生长的抑制效应。结果显示:盐角草过滤培养液和4种根的有机相提取物(甲醇相、正丁醇相、氯仿相和石油醚相)能显著抑制东海原甲藻的生长,改变细胞大小。其中,石油醚相和正丁醇相提取物还能影响藻细胞CHl A含量。有机相提取物中以甲醇相提取物的抑制效果最强,对盐角草甲醇相提取物进行gC-MS分析,得到27种化合物,含量最高的3个组分为5-羟甲基-2-呋喃甲醛、棕榈酸和4-乙烯基-2-甲氧基-苯酚 ...
匡廷云 +6 more
core
Shuitu Baochi Xuebao, 2007 以干旱风沙区林药间作恢复措施为研究对象,研究了通过不同密度柠条林内种植甘草的生态恢复措施对土壤环境的影响.结果表明:8 m,6 m柠条带间的土壤含水量明显高于自然恢复地,3 m带间土壤含水量低于自然恢复地;土壤容重以6 m带距和8 m带距的较低,自然恢复地最高;总孔隙度以6 m带距内的最高,其他处理措施差异性不显著;土壤速效氮、速效磷表现出以自然恢复地较高;物种多样性为8 m带距内的人工甘草恢复区＞6m带距内的人工甘草恢复区＞野生甘草自然恢复区＞3 m带距内的人工甘草恢复区 ...
王占军 +4 more
doaj +2 more sources