Results 21 to 30 of about 8,234 (208)
Preparation of matrix reference material for carbaryl residues in Chinese yam flour [PDF]
, 2023 Objective: This study aimed to establish a method for the Preparation of matrix reference material for carbaryl residues in Chinese yam flour. Methods: Yam powder containing menafyl was prepared by homogenized, freeze-dried, ground, sifted, mixed and ...
CHEN Dongdong +4 more
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Xishuangbanna cucumber landraces and associated traditional knowledge [PDF]
, 2019 The Xishuangbanna cucumber variety (XC), Cucumis sativus var. xishuangbannanesis, has been cultivated, managed and used for many generations by ethnic people in Xishuangbanna Prefecture, South Yunnan, China.
Chunlin, L. +3 more
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Characteristics of Erosive Rainfall and Its Effects on Runoff and Sediment Yield in a Low Mountain and Hilly Area of Lianyungang City [PDF]
, 2022 [Objective] The effects of different rainfall characteristics and different underlying surface conditions on soil erosion and sediment yield were determined in a low mountain and hilly area of Lianyungang City, Jiangsu Province, in order to provide a ...
Cheng Jianmin +3 more
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Monitoring and Evaluating Carbon Sink Capacity for Comprehensive Management of Soil and Water Conservation in Small Watersheds [PDF]
, 2023 [Objective] The carbon sinks of soil and vegetation were monitored and evaluated in order to provide technology and methodology for implementing dynamic monitoring and evaluation of carbon sinks for soil and water conservation projects, and to provide ...
Cheng Hui +6 more
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Shuitu Baochi Xuebao, 2005 通过连续5年的实地调查与观测,研究了10种流动沙地植物沙障治理模式的适用范围、植被恢复效果、沙丘移动距离及投入与产值情况。结果表明:研究地区的降水量水平能够保证踏郎等植物种条的成活,可利用植物沙障治理流沙。除平铺草方格沙障内植小叶锦鸡儿模式和播种草方格内播踏郎、小叶锦鸡儿模式不适应沙丘上部外,10种流动沙地治理模式均属适用模式,但各模式在植被恢复速度、投入、产值和控制沙丘移动速度等方面具有一定差别。相对而言,效果最好的是踏郎植物活沙障模式和小黄柳、踏郎植物活沙障模式 ...
王树力 刘玉山
doaj +2 more sources
Analysis of Nutritional Quality of Tonggu Polygonatum cyrtonema Hua from Different Planting Ways and Growing Years and Construction of Its Evaluation System [PDF]
To comprehensively explore the nutritional quality and construct evaluation system, this paper studied the effects of different planting ways and growing years on the 23 nutritional qualities of Tonggu Polygonatum cyrtonema Hua, and constructs of its ...
Donggen WANG +9 more
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, 2011 生态农村建设是当前建设社会主义新农村的重大举措。论文从农村的生态环境、基础条件和农民意识等方面,探讨了农村生态环境存在的问题,指出了加快农村生态建设的重要性,提出了加强乡镇企业环境综合整治、完善体制机制建设、发展生态农业、开展生态文明教育等措施。针对我国农村生态建设的现状和特点,探索出一种适合我国农村实际情况的可持续发展模式:以经济发展为基础,以科技应用为支点,以政府干预为手段,以制度创新为导向,以法制完善为保障 ...
刘立军 +4 more
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Shuitu Baochi Xuebao, 2020 为探究不同栽培方式对冬小麦生长发育、产量形成及水分利用的影响。通过田间试验，设置传统畦田种植（TC）、垄作种植（RC）和高低畦田种植（HLC）3种栽培方式，其中RC和HLC种植模式分别设置3种灌溉处理（900，720，540 m3/hm2），以TC的常规灌溉（900 m3/hm2）作为对照，研究3种栽培方式下冬小麦生育期内的土壤水分变化与耗水规律，分析栽培方式对产量构成要素和水分利用效率的影响。结果表明：不同栽培方式下冬小麦各生育期的土壤含水量变化具有显著差异，RC处理的集雨储水能力相对较强 ...
刘俊明 +4 more
doaj
, 2009 通过2004年2～12月对古尔班通古特沙漠南缘2年生人工梭梭和沙拐枣混交林内3条典型坡面土壤水分进行了系统监测与研究。结果表明:人工林土壤水分状况受季节性降水、人工林种植密度、地形因子的影响而出现明显的时空分异。在空间上将土壤水分变化划分为三层,0～30cm为活跃层,30～60 cm为次活跃层,60～120 cm为相对稳定层。通过主成分分析,得出地形因子、种植密度对0～30 cm土层土壤水分的影响次序为坡度>坡向>种植密度>高程,30～60 cm土层为坡向>种植密度>坡度>高程,60～120 ...
付恒飞, 宋春武, 蒋进, 陈钧杰
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Human‐driven landscape change, particularly urbanization, is reshaping pollinator communities, yet the functional traits that mediate species persistence remain poorly understood. Dietary specialization is commonly used to predict species vulnerability.
Yan Yang +5 more
wiley +1 more source