Results 91 to 100 of about 771 (145)

Effects of Soil Water, Nitrogen and Phosphorus Supplied on Root and Seedling Growth of Wheat

, 1996
在模拟田间原状土容重的条件下土培,研究了土壤水分和氮磷营养对小麦根苗生长及水分利用的效应。结果表明:在SRWC为40％～70％范围内,土壤水分亏缺严重,Rr_w和ET显著降低,根苗生长严重受阻,RL变短,RDW降低,LA和PDW减少;随着土壤水分趋于良好,Rr_w、ET和LA明显增加,RDW和PDW在SRWC为55％～62％之间时最大,而SRWC在55％上下时RL达最长;土壤轻度干旱有利根系下扎,土壤水分趋于良好有利于根量增长。磷营养可显著提高Rr_w、RL、RDW、ET、LA、PDW和WUE ...
梁银丽, 陈培元
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[Dietary secoisolariciresinol diglucoside alleviates chronic kidney disease in offspring rats caused by maternal trans-fatty acid exposure by regulating the Bcl-2/Bax/caspase-3 signaling axis]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Ma S, Chen M, Wu T, Zhao W.
europepmc   +1 more source

小麦~(13)C分辨率和水分利用效率对氮素与水分的响应

, 2000
水分利用效率反映了环境养分资源对植物生理状况的影响。在Ｃ3 植物中 ,碳同位素分辨率 (Δ)可用来反映植物水分利用效率 (ＷＵＥ)状况[1,2 ] ,(已被用作衡量Ｃ3 植物叶片气体交换对环境变化的指标 ,如土壤水分亏缺[3 ] 、光辐射[4] 、湿度[5 ] 、高ＣＯ2 [6] 和盐渍[7] 。植物Δ与ＷＵＥ或干物质产量间呈负相关[8] ,但Ｗｒｉｇｈｔｅｔａｌ认为正常水分条件下Δ和ＷＵＥ为负相关 ,而干旱条件下Δ和ＷＵＥ无相关性[9] ,但就 ...
上官周平
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[Research progress in auxiliary components of nerve conduit for treating peripheral nerve injuries]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Nong C, Lin H.
europepmc   +1 more source

[Effect of Blood Biochemical Indicators on Exercise Duration in Patients With Stages 3-5 Chronic Kidney Disease: The Mediating Role of Physical Function Status]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Yang Y, Chen H, Liu W, Qi X.
europepmc   +1 more source

Treatment and management for children with urea cycle disorder in chronic stage. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban, 2023
Huang X.
europepmc   +1 more source

Critical nitrogen dilution curve and nitrogen nutrition index of winter wheat in Guanzhong Plain

, 2015
在整理分析关中平原 7 年氮肥大田试验的基础上，分析比较了不同氮肥处理下冬小麦的氮浓度稀释曲线，并构建了关中平原主栽品种小偃 22 地上部生物量的临界氮浓度稀释曲线模型。结果表明: 不施氮、 氮肥不足、 氮肥适宜和过量施氮 4 组处理的平均产量分别为 4 263、 5 097、 6 023、 6 203 kg /hm2 ，氮肥不足处理显著降低了小麦产量，过量施氮与氮肥适宜处理相比产量没有显著差异。植株氮浓度均随生物量增加而降低， 较高的施氮量导致较高的植株氮浓度 ...
冯 浩, 冯浩, 宋明丹, 李正鹏
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[Expert consensus on parenteral nutrition management in neonates (2025)]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Nutritional Committee of Neonatology Branch of Chinese Medical Doctor Association; Preterm Committee of Neonatology Branch of Chinese Medical Doctor Association; Editorial Committee of Chinese Journal of Contemporary Pediatrics.
europepmc   +1 more source

Effect of Elevated CO_2 Concentration and Nitrogen Application on Translocation of Dry Matter and Nitrogen Restored before Anthesis in Winter Wheat

, 2011
为探讨大气CO2浓度升高对冬小麦花前贮存碳氮转运的影响及氮素营养的调节作用,以小偃22和小偃6号为材料,于2007-2009连续2个生长季,利用开顶式气室进行盆栽试验,对背景CO2浓度(375μLL-1)和高CO2浓度(2007-2008年度680μLL-1,2008-2009年度750μLL-1)条件下不同施氮处理的干物质和氮素在籽粒、花前地上部中的累积以及花后营养器官的转运进行了评价。2007—2008年度设4个施氮水平,分别是0、0.1、0.2和0.3gkg-1土 ...
李世清, 沈玉芳, 许育彬
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[Potential biological mechanisms underlying spaceflight-induced depression symptoms in astronauts]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Li Z, Liu J, Liu B, Wang M, Ju Y, Zhang Y.   +5 more
europepmc   +1 more source