Evaluation and implementation of several bedding plant technology components for the raising of potato breeding seedlings     

H. De Jong 《American Journal of Potato Research》1989,66(2):93-100

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Ac novachip: a new potato cultivar with excellent chip quality after long storage and reconditioning     

H. De Jong  G. C. C. Tai  A. M. Murphy  T. R. Tarn  J. H. E. Thorpe  W. J. Arsenault  R. H. Bagnall  H. W. Platt  D. A. Young 《American Journal of Potato Research》1995,72(7):417-425

AC Novachip is a smooth, white-skinned potato cultivar with oval to oblong tubers and a maturity similar to Kennebec. It has excellent chip quality, especially after long storage and reconditioning. The boil and bake quality is similar to Kennebec; the specific gravity is higher than Kennebec but lower than Atlantic. AC Novachip has moderate resistance to common scab and PVY.  相似文献   

我国南方大豆地方品种农艺和品质性状的遗传参数分析   总被引：5，自引：0，他引：5  

杨德  盖钧镒 《大豆科学》1990,9(1):9-18

由南方13省区的3769份夏大豆地方品种按省分层随机抽样而得的143份材料组成地方群体;由20份南方夏大豆推广品种及品系组成改良群体,在南京两年三重复试验表明,南方地方群体主要特点是晚熟(132.56天),秆较矮(58.05cm),中粒(14.34g/100粒),底荚高(18.47cm),分枝中等(3.86),产量低(1199.25kg/ha),蛋白质含量高(43.73％)、脂肪含量中等(20.19％)。该群体农艺和品质性状具有丰富的遗传变异,并由5％相对遗传进展特点将45个性状分为,GSI:极大(>40％);GSⅡ:大(40％—10％);GSⅢ:中等(10％—5％);GSⅣ:一定(<5％)等四类,其中GSⅠ、GSⅡ类多属产量、生育期、粒茎比、株高、百粒重等农艺性状,GSⅢ、GSⅣ类多属蛋白质含量及其氨基酸组分、脂肪含量等品质性状。  相似文献   

沼渣在秋马铃薯上的应用试验   总被引：6，自引：1，他引：6  

蒋富友  刘净  韦德祥 《中国马铃薯》2005,19(4):221-222

采用沼渣作底肥并与普通农家肥作比较,总结其对秋马铃薯生产的作用及其生产施用量,结果表明:施用沼渣作底肥,对秋马铃薯的出苗率有所提高,对块茎的形成、膨大、色泽都有显著的效果,为大面积推广提供了试验依据。  相似文献   

田间条件下水稻根系分布及其与土壤容重的关系   总被引：23，自引：2，他引：23  

张玉屏  朱德峰  林贤青  焦桂爱  黄群 《中国水稻科学》2003,17(2):141-144

 采用大田和筒栽方法研究了超高产三系杂交稻协优9308和两系杂交稻两优培九在穗分化期和开花期根系生长和分布及土壤容重对根系分布的影响。结果表明，在田间条件下，土层15 cm内水稻根系占根系总量的89%～98%，深层根系丛间比丛中比例高。不早衰的协优9308根系生长量较两优培九大。土壤容重提高，根系总生长量下降，且深层根系的量和比例下降。就深耕法对水稻根系生长和分布的影响进行了讨论。  相似文献   

施肥对小麦根系活性、延缓旗叶衰老及产量的效应   总被引：25，自引：6，他引：25  

王法宏  余松烈等 《麦类作物学报》2001,21(3):51-54

1996－1998年，在大田生产条件下，就施肥水平对小麦群体根系活性，延缓旗叶衰老及籽粒产量的影响进行了比较研究。结果表明，土壤肥力和施肥水平对小麦的群体根系活性有显著的调控作用，土壤肥力高则根系活性强。施肥可明显促进小麦群体根系活性的提高，延缓旗叶衰老（增加叶绿素含量，提高光合速率，增强SOD和POD活性，降低MDA含量）, 显著提高小麦籽粒产量，其中有机无机肥配施效果更佳。  相似文献   

Absorption,Distribution and Elimination of Carnosic Acid,A Natural Antioxidant from <Emphasis Type="Italic">Rosmarinus officinalis</Emphasis>, in Rats     

Doolaege EH  Raes K  De Vos F  Verhé R  De Smet S 《Plant foods for human nutrition (Dordrecht, Netherlands)》2011,66(2):196-202

The absorption, distribution and elimination of carnosic acid, the main antioxidant found in rosemary was studied, in vivo, in rats. Therefore, carnosic acid was administrated in a single dose, intravenously (20.5 ± 4.2 mg/kg) and orally (64.3 ± 5.8 mg/kg), to four and nine rats, respectively. Blood samples were collected at different time points, and plasma concentrations of carnosic acid were determined using LC-MS. Furthermore, total collection of urine and feces was done during 4 h and 24 h for the intravenous and oral administrations, respectively. After euthanizing the rats, intestinal content, liver and muscle tissue were sampled to determine carnosic acid concentrations. The bioavailability of carnosic acid, after 360 min, was 40.1%. Traces of carnosic acid were found in the rats intestinal content, liver and muscle tissue of abdomen and legs. The recovery of carnosic acid in the feces, 24 h after oral administration, was 15.6 ± 8.2%. Carnosic acid is absorbed into the bloodstream after oral administration in rats and is therefore bioavailable. It was found that carnosic acid in vivo is present in its free form and that its main elimination route is the fecal route.  相似文献   

Improved diagnosis of powdery scab (Spongospora subterranea f.sp.subterranea) symptoms on potato tubers (Solanum tuberosum L.)     

Eisse G. De Haan  Gé w. Van Den Bovenkamp 《Potato Research》2005,48(1-2):1-14

Summary Based on visual inspection, discrimination between common scab (Streptomyces spp.) and powdery scab (Spongospora subterranea) can be difficult. Inspections are performed on unwashed samples, incidentally supported by microscopic examination. During 1994–1996 surveys were performed in The Netherlands on tubers with symptoms resembling common scab. Under microscopic assessment nearly all samples showed the presence of structures resembling cystosori (sporeballs) ofS. subterranea. At that time confirmation using alternative techniques was not possible. In 2003 research was undertaken to clarify the situation with respect to scab on potato tubers in The Netherlands. One hundred and eighteen scab samples were extensively tested forS. subterranea. All samples were digitally photographed, microscopically examinated and tested with real-time PCR and DAS-ELISA. Use of these modern methods resulted in a clear picture of symptoms that can be attributed toS. subterranea. A lot of scab samples with structures resembling cystosori could not be confirmed as contaminated withS. subterranea.  相似文献   

我国春麦区部分小麦品种品质状况分析   总被引：20，自引：6，他引：20  

张勇  何中虎等 《麦类作物学报》2002,22(1):27-32

1999年将 38份春小麦品种 (品系 )种植于内蒙古呼和浩特 ,对其磨粉品质和面包烘烤品质进行了评价。结果表明 ,我国春小麦品种的面包烘烤品质较差 ,不同地区品种间品质差异较大 ,辽宁和内蒙品种的磨粉品质和面包烘烤品质优于其它地区的品种。回归分析表明 ,蛋白质含量和单位蛋白质含量的面包体积决定了面包体积总变异的 99.9% ,硬度、沉淀值和吸水率对面包总分有重要作用。品种的出粉率主要取决于 1心槽路出粉率 ,2心和 1皮槽路出粉率对出粉率贡献也较大。高分子量麦谷蛋白亚基 (HMW GS)Glu A1和Glu D1位点的等位变异与品质性状密切相关。面包烘烤品质的改良应在分析HMW GS的基础上 ,将硬度作为选择指标之一 ,适当提高蛋白质含量 ,重点加强对沉淀值的选择  相似文献   

Effect of biochar amendment on soil‐silicon availability and rice uptake          下载免费PDF全文

Xiaoyu Liu  Lianqing Li  Rongjun Bian  De Chen  Jingjing Qu  Grace Wanjiru Kibue  Genxing Pan  Xuhui Zhang  Jinwei Zheng  Jufeng Zheng 《植物养料与土壤学杂志》2014,177(1):91-96

Rice growth and its resistance to pests had been often constrained by soil‐silicon (Si) availability. The purpose of this study was to assess the potential of biochar soil amendment (BSA) to improve Si availability in paddy soils. A cross‐site field trail with BSA was conducted in six locations with different climatic and crop‐production conditions across S China. Plant‐available Si content before field‐trials establishment and after rice harvest, as well as Si content in rice shoot were determined. Varying with site conditions, plant‐available Si content of soil was observed to increase significantly with BSA in most sites. Significant increase in rice shoot Si was detected in four out of the six sites, which was well correlated to the concurrent increase in soil pH under BSA treatment. This study demonstrates an important role of BSA to improve Si availability and uptake by rice mainly through increasing soil pH of the acid and slightly acid rice soils.  相似文献