Results 71 to 80 of about 6,048 (156)
Zhejiang Daxue xuebao. Lixue ban, 2005 比较了杭州植物园人工湿地中7种植物的生长和营养吸收特性.种类包括美人蕉(Conna indica)、香蒲(Typha augustifolia)、 芦苇(Phragmites australis)、紫露草(Tradescantia reflexa)、斑茅(Saccharum urundinaceum)、黑麦草(Lolium perenne)和灯芯草(Juncus effusus).这些植物生长在用于处理植物园观鱼池轻度营养化水的砂砾床复合垂直流人工湿地系统中.2002年7月中旬 ...
JIANGYue-ping(蒋跃平) +6 more
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Effects of simulated acid rain on physiological indexes and Ca-related genes expression of four tree species under different calcium levels in soil [PDF]
, 2012 酸雨在我国尤其在西南部地区已成为十分严重的环境问题。本研究中，我们选取了四种在我国南方受酸雨危害严重地区广泛分布的木本植物作为实验材料，分别为枫香(LiquidambarformosanaHance)，木荷(SchimasuperbaGardnetChamp.)，马尾松(PinusmassonianaLamb.)及红豆杉(Taxuswallichianavar.mairei)。研究土壤中不同的钙水平对四种木本植物在应对酸雨胁迫中的各种响应，包括酸雨对植物叶片的伤害，叶绿素含量，叶片净光合速率 ...
吴倩
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Metabolomics Analysis of Five Types of Wangdu Chili Peppers Based on HPLC and GC-MS [PDF]
To analyze the metabolic differences in Wangdu peppers, this study employed high-performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS) to detect chemical components and perform non-targeted metabolomics analysis on ...
Jianwei MAO +5 more
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Physiological responses of rice to increased day and night temperatures [PDF]
, 2017 A more rapid increase in night-time temperature compared with day-time temperature and the increased frequency of heat waves associated with climate change present a serious threat to rice (Oryza sativa L.) production and food security.
Shi, Wanju
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Shuitu Baochi Xuebao, 2004 对刚果12号桉无性系W5人工林营养元素积累、分布和生物循环进行了研究。结果表明，刚果桉W5不同组分的营养元素含量存在差异。树叶的主要营养元素N、P、K、Ca、Mg含量均较高，树皮的Ca、K含量较高，树干主要营养元素的含量均较低；刚果桉W5人工林主要营养元素年净积累量随林龄增长而增加，2年生的主要营养元素净积累量的增幅最大；刚果桉W5人工林的N、K或Ca的年吸收量与总存留量较高，Mg次之，P最小。植后第5年，Ca的吸收与存留增加明显；刚果桉W5人工林归还林地的主要营养元素比例很低，2 ...
钟继洪 李淑仪 蓝佩玲 廖新荣 廖观荣
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Properties of ecological environment damage and their mechanism of restoration in arid and semi-arid coal mining area of western China [PDF]
The focus of coal development in China has been strategically shifted westward. That realize green mining of coal resources and coordinated ecological development becomes one of the important measures to ensure national energy security.
Suping PENG, Yinli BI
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Shuitu Baochi Xuebao, 2019 磷在土壤中易被固定沉淀，在植物磷利用率低的情况下，过度施肥会造成磷肥浪费，可能通过地表径流、地下水溶解等方式，造成水体富营养化产生面源污染，对人类生产生活造成较大影响。丛枝菌根真菌（arbuscular mycorrhizal fungi，AMF）和植物结合所形成的共生菌根可以显著增强植株对磷的吸收利用。通过AMF可以提高宿主植株对磷的吸收转运的特性，从AMF促进植株对磷元素的摄取机制、AMF促进植物磷摄取分子机理 ...
薛英龙 +7 more
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Effects of Coated Potassium Chloride on Soil Nutrient Supply Intensity, Maize Yield and Quality [PDF]
[Objective] Controlled release of potassium chloride can achieve slow release of potassium ions synchronized with crop absorption, while ensuring the effectiveness of potassium ions in the soil, meeting the demand for potassium in the later stage of crop
CHEN Qi +13 more
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Nitrogen and phosphorus concentrations,N∶P ratio and resorption efficiency of leaves in different forest types [PDF]
, 2009 以福建东山沿海防护林中木麻黄、厚荚相思、刚果桉和湿地松4种主要树种为研究对象,探讨了纯林和混交林成熟叶与衰老叶中的养分状况、氮磷比、养分内吸收率以及它们之间的关系。结果表明:叶片中的养分浓度和内吸收率一般表现为纯林高于混交林、固氮树种高于非固氮树种。这是由于混交林和固氮树种改善了立地条件,林木能够从土壤中吸收较多的养分,从而降低了二者叶片中的养分内吸收率。各林分类型成熟叶片中的氮磷比都大于14,表明这些立地条件都存在不同程度的磷限制,导致大部分林分叶片磷内吸收率(rEP)大于氮内吸收率(rEn ...
叶功富 +4 more
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Shuitu Baochi Xuebao, 1995 采用根箱法，在人工气候室培养条件下，研究谷子根系提水作用，根系吸收以及隔水层对土壤水分变异、土壤墒情的影响。结果表明，谷子具有根系提水作用，即在黑夜蒸腾蒸发量小的情况下，深层的根可以吸收深层（隔水层下）土壤水分，并释放到上部干土层，增加土含水量。黑夜１２ｈ根箱１０ｃｍ＾２地表１０ｃｍ土壤剖面中增加了２．６９ｍｌ水。根系吸收可使根区不同部位土壤水势变异，表现在Ｃ１至Ｃ８根区土壤含水量出现规律性变化。
樊小林 李玲
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