氮磷钾不同配比对甜菜产质量的影响     

任志山  陈拴彪  石海刚  郭瑞  袁金柱 《中国糖料》2003,(4):22-24

通过内蒙古西部地区华资实业股份有限公司原料区3个不同试验点进行的甜菜氮、磷、钾不同配比试验,明确了氮素为甜菜产量和产糖量的主效因子,磷为含糖率的主效因子(达拉特旗点除外),提出了不同地区氮、磷、钾3要素的施用量及其比例。为甜菜专用肥的配方调整提供了科学依据。  相似文献   

三种不同生长环境下二球悬铃木抗寒性的研究     

韩静  刘丽馥  崔文山 《山东林业科技》2008,38(1):28-29

以三种不同生长条件下的二球悬铃木为试材，设定7个不同的温度梯度，对低温胁迫下植株的生理生化变化规律进行研究。结果表明：低温诱导过程中组织内游离脯氨酸、丙二醛和可溶性糖含量变化明显，可以作为鉴定二球悬铃木抗寒性的生理指标。  相似文献   

Seasonal Development of Genotypic Differences in Sugar Beet (Beta vulgaris L.) and Their Interaction with Water Supply     

D. Bloch  C. Hoffmann 《Journal of Agronomy and Crop Science》2005,191(4):263-272

Depending on genotype, sugar beet can differ considerably in yield and quality characteristics. These are additionally modified by environmental conditions with drought stress recently gaining in importance, restricting growth and altering the chemical composition of the beet. The occurrence and development of these genotypic differences during the vegetation period and their possible interaction with environmental conditions were investigated. In 2002 and 2003, four sugar beet genotypes differing in yield and quality and putative different with regard to drought tolerance were tested in field trials, partly under irrigated conditions, in a total of 10 environments with consecutive harvests starting in early summer. In 2 years of stress and non-stress conditions they exhibited significant differences for taproot and leaf dry matter and the concentration of sucrose, K, Na and α-amino nitrogen in the taproot. These differences existed already in mid-June and virtually did not change any more from this time on. Accordingly, interactions between genotype and harvest date did not occur. For sugar beet, genotype by environment interactions generally do not exist. Water supply, as an important single determinant of the effect of the environment, was studied separately analysing data from selected locations. Under drought conditions, withholding irrigation reduced leaf and taproot growth and root-to-leaf ratio, decreased the percentage of sucrose in dry matter and resulted in an accumulation of α-amino N. Interactions between genotype and water supply did not occur for any of the parameters under study. A genotype-specific high α-amino N content, which might be of advantage for osmoregulation, did not improve the adaptation to drought. Differences in leaf maintenance or taproot-to-leaf ratio during drought also did not affect yield response. Due to the lack of interaction between genotype and harvest date as well as between genotype and irrigation it is concluded that harvest date or climatic factors of the growing region do not have to be taken into consideration when choosing a variety.  相似文献   

Effect of Shading on Nodule Growth and Sugar Distrihution in Faha Bean (Vicia Faba L.)     

M. Z. XiA 《Journal of Agronomy and Crop Science》1995,174(2):125-132

The faba bean ( Vicia faba L.) is an important grain legume world wide, yet the relationship between light intensity and nodule development and N₂ fixation has received minimal attention. An experiment was conducted to study the effects of shading on faba bean growth, seed yield, nodule development, and the distribution of total N and total sugar among plant parts. Seeds of the V. faba cultivar Xichang Dabai were sown in pots at Xichang. China, in 1986–90. The plants subjected to 50 % and 20 % shading for 145 d had thinner and taller main stem than the control, and fewer flowers, pods, and seeds. Poor dry weight of organs and less developed underground parts were recognized. Shading caused the deficiency of photosynthate (supply), subsequently less nodules formed poorer fresh weight of nodules was produced and nodule senescing advanced. Total N and total sugar contents per plant and in roots, stems and leaves were consistently lower under shading regimes, but the contents in nodules did not change significantly. It seems that the insufficient photosynthate supply limited both N and C metabolism in shading plants by first limiting growth of the whole plant and nodule, and that the lower total N content in faba bean plant under shading regime was attributed to an decreased effective nodule mass and advanced nodule senescing.  相似文献   

新疆棉纤维含糖量在棉株上的分布规律及降低棉纤维含糖量途径的探讨     

董秀暖  李林  杨金菊  柴新星 《新疆农业大学学报》1992,(2)

本研究对新疆大面积栽培的军棉1号和新陆早1号进行了可溶性糖含量的测定分析.结果表明:第1至第6果枝的第1铃位含糖量较低,而第7果枝以上及外围铃含糖量较高.影响因素很多,我们认为:主要是新疆生长季节后期夜间低温造成的.可采取“躲避”后期夜间低温影响的栽培措施,使收获棉纤维全部在最适夜温条件下完成其发育成熟过程.  相似文献   

Einfluß von Hauptbestandsbildner (Lolium multiflorum Lam., Lolium X boucheanum Kunth, Lolium perenne L. und Dactylis glomerata L.), Narbendichte, N-Düngung und Zeit auf Ertrag, Energiedichte, P/E-Quotient und Nitratgehalt     

W. Opitz von Boberfeld  S. Elles 《Journal of Agronomy and Crop Science》1990,164(5):289-296

The influence of main species (Lolium multiflorum Lam., Lolium X boucheanum Kunth, Lolium perenne L. and Dactylis glomerata L.), sward density, nitrogen and time on yield, energy content, crudeprotein/energy ratio and nitrate content The aim of this investigation was to determine the influence of different rates of nitrogen fertilizer and of varied sward density on yield and chemical composition of some non-perennial (Lolium multiflorum, Lolium X boucheanum) and some perennial species (Lolium perenne, Dactylis glomerata) in a field experiment. Excepted 600 kg N ha^?l - yr^?1 the non-perennial species produced the highest energy yields. At a fertilization level of 400 kg N ha^?1 yr^?1 had sward density an influence on energy yield of Lolium multiflorum. It appeared that almost the energy content of the Lolium species was higher than in Dactylis glomerata. In most cases there were little differences between the Lolium species. There was a positive correlation between the NFEcontent and the content of water soluble carbohydrates and the energy content which was depressed by applying increasing rates of fertilizer. Generally at the lowest rate of nitrogen used (200 kg N ha^?1 yr^?1) there were positive effects on crude protein/energy ratios. The crude protein/energy ratio was higher of Dactylis glomerata than that of the Lolium species. The nitrate content increased to critical values when applying 400 kg N ha^?1 yr^?1. Dactylis glomerata had the highest and Lolium perenne the lowest nitrate content. At high rate of fertilizer, plots with high sward density sometimes had higher nitrate contents than open swards. The results of the experiment indicate that there are differences in quality even between species with high performance. Regarding the quality of grass swards, future attention should be focused on the main species and on sward density.  相似文献   

Effects of Root Zone Temperature on Root Activity of Two Potato (Solanum tuberosum L.) Clones with Different Adaptation to High Temperature     

B. Sattelmacher    H. Marschner  R. Kühne 《Journal of Agronomy and Crop Science》1990,165(2-3):131-137

Under controlled environmental conditions, the effect of optimal (20 °C) and supraoptimal (30 °C) root-zone temperature on root activity (respiration, soluble sugar content, ethylene release, nitrogen uptake and translocation) was studied in water culture with two potato clones differing in the heat tolerance of their root systems. Root respiration was little affected by raising temperature from 20 °C to 30 °C. However, in both clones assimilate allocation to the roots was strongly depressed. In the heat sensitive clone LT-1 exposed to 30 °C root-zone temperature, concentrations of soluble sugars in the apical root zone (0–10 mm) increased with time, presumably as a result of the cessation of root growth. The rate of nitrate absorption was not significantly affected by root-zone temperature. However, the export of nitrogen (xylem exudate) was depressed in the heat tolerant clone whereas in the heat sensitive clone the export of total nitrogen and the proportion of nitrate increased. No effect of root-zone temperature on ethylene release was observed in our experiments.  相似文献   

Changes in sensitivity of Cercospora beticola populations to sterol-demethylation-inhibiting fungicides during a 4-year period in northern Greece     

G. S. Karaoglanidis †‡  P. M. loannidis  C. C. Thanassoulopoulos 《Plant pathology》2002,51(1):55-62

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甜菜种质资源的灰色关联度分析     

崔平  郑子英 《中国糖料》1994,(3)

用灰色系统理论中的关联度分析法对甜菜种质资源的优良种质进行多性状综合评判，结果１０１２Ｂ和７８００１６Ａ／２的等权与加权关联度均居第一位和第二位，说明１０１２Ｂ的综合性状表现最好，７８００１６Ａ／２稍次，两者为是优种质；７４１２／８２＿３、７４１２／８２＿（３－４）和１０１２Ａ的等权关联度依次靠后，与其加权关联度位次相差不大，说明３份材料的综合性状表现较好；其它两份材料（Ｇ７９６８０、１３０１／９）分属高糖型、丰产型种质。  相似文献   

Change in ^14C-soluble Sugar Involved in the Photosynthate Translocation Pathway of Tomato     

QI Hong-yan LI Tian-lai LIU Hai-tao ZHANG Jie 《中国农业科学(英文版)》2006,5(3):209-215

Liaoyuanduoli tomato was planted in pots in a solar greenhouse. The first leaf below the second cluster was labeled by ^14CO2 with a dose of 0.555 MBq 30 days after the second cluster anthesis. Mesophyll, midrib, petiole vascular of the fed leaf, internode vascular below the fed leaf （adjacent to the fed leaf）, peduncle vascular of the second cluster, sepal, fruit pedicle, pulp, pectinic, and dissepiment were taken 2, 4, 8, 12, 20, 24, 48, and 72 h, respectively, after ^14CO2 feed to determinate the composition and specific activity of carbohydrate at different sites and different time after the labeling. The results indicated that almost all of the photosynthates resulting from 1 h of photosynthesis could be transported out of the leaf within 72 h and more than 85% of them were exported within 24 h. The greatest amount of sucrose transport occurred in the internode pedicel vascular bundle 8 h after the start of photosynthesis. Assimilates entering the fruit through the internode and pedicel vascular bundles were detectable but in small quantities 2 h after photosynthesis. Only the radio activity of sucrose but not that of glucose and fructose was detected, suggesting that some of the sucrose in the fruit came directly through the phloem at an early stage of fruit development, not through the synthesis of glucose and fructose. Fruit vascular may be the part where sucrose first metabolized after it entered the fruit.  相似文献