Results 21 to 30 of about 17,679 (167)
ABSTRACT This study examines the ability of households to maintain economic welfare and the threshold at which it occurs. We use the Mobile Financial Service Survey (MFSS) data comprising a probability sampling of all Ghanaian households for the econometric analysis.
Alhassan A‐. W. Karakara +2 more
wiley +1 more source
为探讨滴灌条件下棉田中地膜残留含量对土壤水盐及作物生长的影响,在棉田设置150(T1),230(T2),465(T3),857(T4),1 250(T5),1 640(T6) kg/hm2、原试验地土壤(CK1)和无残膜对照组(CK2)8种残膜含量处理,分析了地膜残留含量对滴灌棉田中的土壤水盐、土壤和作物根系氮素以及产量的影响。结果表明:随着残膜含量的增加,土壤含水率逐渐降低,土壤盐分的富集效果逐渐增强;0—40 cm土层土壤水盐变异程度与残膜含量呈正相关,T5和T6的土壤水盐变异系数(CV)明显较大 ...
徐阳 +4 more
doaj
モトヒ チッソ シヨウ ジキ ガ スイトウ ノ モトヒ チッソ キュウシュウ ト シュウリョウ ニ オヨボス エイキョウ [PDF]
【要約】水田での基肥窒素施用後の入水までの期間が水稲の施肥窒素吸収,水稲の収量に与える影響について圃場条件下で検討した.また,その期間中の土壌水分条件が施肥窒素の形態変化に与える影響について,室内培養法で検討した.得られた結果は以下の通りである.①室内培養実験の結果,土壌水分条件に無関係に施用窒素の無機態窒素としての残存量は時間の経過とともに指数的に減少した.無機態窒素としての残存量は圃場容水量60%水分条件下で80%水分条件下より少なかった.圃場容水量の60 ...
安藤 豊 +2 more
core +1 more source
Variations in skin biophysical parameters with age, sex and breed in dogs
Background – Understanding the physiological and biophysical characteristics of skin provides information for developing appropriate management strategies for skin diseases. However, in dogs, variations in skin biophysical parameters, such as age, sex and breed, remain poorly understood.
Je‐Seong Kwon +8 more
wiley +1 more source
为了分离绝缘纸老化程度和水分对频域介电谱的影响及提高变压器绝缘纸老化程度和水分含量评估精度,文中通过开展加速热老化试验制备了老化程度和含水量均不相同的5组油纸绝缘试样,并对各组试样进行tanδ频谱测试。试验结果表明,在10-310-1Hz频段内,tanδ曲线随绝缘纸老化程度增加而上升;在10-3102Hz频段内tanδ曲线随绝缘纸含水量增大显著上升,在特征频段10-1102Hz和10-310-1Hz内求取tanδ曲线对频率的积分值Sm和SDP分别作为表征水分含量和老化程度的特征量 ...
曹建军, 隋彬, 杨飞豹, 尹小兵
doaj
Occurrences of dust storms and long‐distance movement of dust across landscapes is constantly increasing in south Asia. This dust is expected to have profound impact on vegetation health and sustainability as dust may contribute to nutrient budgets of the forest ecosystems, while it could impart various stresses to the plants.
Shree P. Pandey +2 more
wiley +1 more source
坡向和坡位对林地土壤水分有一定影响.林分相同时,阴坡林地的土壤水分含量高于阳坡. 阴坡河北杨林、柠条灌木林和沙棘灌木林的土壤水分含量分别比阳坡高约2.53%~3.20%,0.7 7%~1.01%和2.35%.坡向和林分相同时,坡下部林地的土壤水分含量相当于、略高于或明显高于坡上部和中部.阴向峁坡下部柠条灌木林的土壤水分含量与峁顶、峁坡上部和中部无明显差异;东坡和西北坡下部油松林的土壤水分含量比坡上部仅分别高0.95%, 1.46%(4月)与1.28%,0.35%(6月 ...
王孟本 李洪建
doaj
Human intestinal Bacteroides spp. RHEIN-I and RHEIN-II capable of transforming rhein to rheinanthrone, induce rhein-dependent diarrhea in rats [PDF]
Two rhein-metabolizing bacteria were isolated from human feces. The biochemical and morphological characteristics of both isolates were typical of Bacteroides spp. and named strains RHEIN-I and RHEIN-II, respectively. Rhein was effectively metabolized to
Akao Teruaki +3 more
core +1 more source
Summary The importance of marine angiosperms, or seagrasses, as foundation species for marine coastal ecosystems is in marked contrast to their low species number of only 70 described taxa. Seagrass species tend to have very similar overall morphologies dictated by hydrodynamic forces of the ocean environment.
Xiaomei Zhang +14 more
wiley +1 more source
采用烘干法及WP4水势仪对黄土高原水蚀风蚀复合区人工林下土壤重量含水量及水势进行测定,从土壤水分数量和能量两方面分析该区土壤水分时空分布和动态变化特征,并且通过实测数据对不同树种土壤水分特征曲线进行拟合,旨在为该区今后植被建设及生态用水提供理论参考。结果表明,各树种在0-300 cm土层土壤含水量随深度增加而逐渐降低,并趋于稳定。0-30 cm土层土壤含水量变化剧烈,30 cm以下土层土壤含水量逐渐降低,并趋于稳定在3.00%~5.00%。土壤水分受降雨量及其分配影响显著,观测期内土壤储水量盈余26.7
周海光 +4 more
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