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通过介绍华南地区居住小区的建筑特点和当前的园林景观设计类型，总结出当前居住小区园林景观空间设计的内容；并据此提出一些看法，以其能对当前华南居住小区的园林景观设计工作有所帮助。 相似文献
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芒果适应性广、抗性强、绿化美化效果好，又具有一定经济价值，是南方城市园林绿化的优良树种之一。在园林绿化中常作为行道树和庭荫树，应用于道路绿化、公园绿化、居住区绿化和工厂绿化。本文还总结了要在园林绿地中的栽培技术。 相似文献
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本文根据风景区绿化特点，分析风景区实施生态绿化应遵循的原则，并以福州鼓山国家风景名胜区二期登山道建设为例，探讨生态绿化综合技术在风景区的应用，从而为风景区绿化探索新思路。 相似文献
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福建省高速公路景观绿化植物的选择和配置 总被引：3，自引：0，他引：3
本文就福建省高速公路（福州－诏安段、和溪－龙岩段）景观绿化植物的选择和配置作初步探讨，肯定了绿化植物选择和配置的优点，并指出其中不足之处。同时论述高速公路景观绿化植物选择和配置的四大原则，推荐30种福建省高速公路景观绿化最适植物和最常用植物。 相似文献
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绿化植物在盐碱地中成活率差异很大．最高的达100％，最低的仅有1％，选择适应性较强的树种，才能使盐碱地绿化达到较好的效果。 相似文献
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绿化植物在盐碱地中成活率差展很大，最高的达１００％，最低的仅有１％，选择适应性较强的树种，才能使盐碱地绿化达到较好的效果。 相似文献
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Low tendency to tuber greening under light exposure is a desirable trait for marketing and processing potatoes. Knowledge of the genetic basis of this trait is limited. During two consecutive years tuber greening after 2-week light exposure was evaluated on 17 unselected diploid potato families obtained between parents with varying tuber-greening tendencies. Parents of these families and standard cultivars were evaluated at the same time. External and depth of tuber greening were examined after tubers were exposed to 2 weeks of light in the greenhouse followed by storage at 10 C, 4 C, and after reconditioning at 18 C. Families, storage conditions, and years significantly influenced tuber greening. Distribution of greening indicated it would be possible to select individuals with very low tuber-greening tendency. Generally, external tuber greening was more intense than depth of greening. External tuber greening increased during storage while depth of tuber greening decreased. A significant maternal effect on external tuber greening was found in one of the three sets of reciprocal crosses after storage at 4 C. Both general and specific combining abilities were important in the inheritance of tuber greening. The correlations between external and depth of tuber greening in most families were significant and relatively high. The results indicated that genotypes with low tendency to tuber greening can be selected in diploid families. 相似文献
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通过对海南垂直绿化植物应用的调查，发现景观效果较好的垂直绿化植物有101种，隶76属38科；其中灌木23种，藤本60种，草本及禾草类18种。简要分析了海南垂直绿化植物的应用现状，并介绍了部分垂直植物的绿化应用。 相似文献
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通过调查冻害发生后本地绿化植物受害程度以及灾后救治,提出对冻害植物进行适时适度修剪,科学的肥、水管理,强化树体,及时防治病虫害,是快速恢复绿化树生势的有效方法。同时,建议合理利用乡土植物,以减少绿化树的冻害。 相似文献
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Varietal differences in potato tuber greening 总被引：1，自引：0，他引：1
Alvin F. Reeves 《American Journal of Potato Research》1988,65(11):651-658
Greening reactions of 144 potato varieties (16 russet, 29 red, 99 white) were evaluated. Three components of greening (external color, internal color, and depth of color) were measured. In general, depth of greening was less in russetted varieties than in white varieties. Red varieties showed less discoloration for all three components. The three greening components appeared to be independent, and might be inherited separately. 相似文献
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水稻辐射白色转绿突变系转绿过程中光合特性研究 总被引：2，自引：0，他引：2
对水稻转绿型白化突变系W25和亲本2177S进行了研究。白化期叶绿素和蛋白质含量很低,随叶片转绿,叶绿素含量增加,转绿第30天达到亲本的水平。在转绿过程中,蛋白质含量和Rubisco含量也显著提高。突变系W25叶片内的Rubisco含量和活性在转绿30 d后超过亲本,光合速率在转绿18 d后接近亲本。 相似文献
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The use of accent lighting in retail stores has focused illumination on potatoes for greater consumer awareness. Unfortunately, this directed light on displayed potatoes may impact the rate or level of tuber greening. The objective of this study was to evaluate the influence of various retail accent light sources on greening and quality of illuminated tubers. Two separate experiments exposed ‘Russet Burbank’ potato tubers to fiber optic, ceramic metal halide, fluorescent, fluorescent with filter lighting (experiment 1) and fiber optic, halogen, and fluorescent lighting (experiment 2). In each experiment, tubers were exposed to a consistent light intensity (1390 lx in experiment 1 and 1300 lx in experiment 2) in addition to a dark control. Tubers were illuminated for 22 h per day at an ambient room temperature of 22 C. Six randomly selected tubers were evaluated for level of greening, chlorophyll concentration, and weight loss at day 0, 2, 4, 7, and 9. Total glycoalkaloid content was analyzed at days 0 and 9. In experiment 1, the fiber optic and fluorescent illuminated tubers showed significantly lower chlorophyll content compared to the ceramic metal halide light source. There was no significant difference in chlorophyll level or greening rating between the fluorescent light source and fluorescent with filter. In experiment 2, the fiber optic illuminated tubers had lower chlorophyll content and less visual greening compared to the halogen illuminated tubers. Total glycoalkaloids were not significantly impacted by light source. The use of fiber optic lighting or a combination of fiber optic lighting with standard fluorescent lighting would retard the progression of greening in the retail store yet potentially highlight the commodity for consumer eye-appeal. 相似文献
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Greening of potato (Solarium tuberosum L.) tubers is often a problem in retail markets. An experiment was performed to study the mode of inheritance of tuber greening in 24-chromosome potatoes. Tuber greening was determined to be quantitatively inherited. Genetic and environmental variance components were calculated. Tuber greening inheritance is due to additive and epistatic effects. Epistatic effects accounted for 59% of the genetic variance. No dominance or maternal effects were observed. Narrow sense heritability was 0.27 and broad sense heritability was 0.66 after location, block, and genotype by environment interactions were removed. Broad sense heritability for tuber greening is large enough to permit effective selection against tuber greening in potato breeding programs when epistasis can be fixed. 相似文献
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Visible-near infrared spectroscopy based citrus greening detection: Evaluation of spectral feature extraction techniques 总被引：2，自引：0，他引：2
Citrus greening is a serious disease affecting citrus production in Florida and different parts of the world. This disease is spread by an insect vector and the trees are killed several years after infection. There is no known treatment for the disease. Disease detection and removal of infected trees is a critical part of citrus greening disease management efforts. This paper reports the evaluation of spectral features extracted from visible-near infrared spectroradiometer spectra for their potential to detect citrus greening disease. The extraction of spectral features is an effort to lower the cost of the optical sensor while maintaining their performance. Spectral features: (i) spectral reflectance bands and (ii) vegetation indices (VIs) were derived from 350-2,500 nm spectral reflectance data using two feature extraction methods: stepwise discriminant analysis and stepwise regression analysis. Following the selection of spectral features, the features were assessed using two classifiers, quadratic discriminant analysis (QDA) and soft independent modeling of classification analogies (SIMCA) to determine the overall and individual class classification accuracies. The classification results indicated that both the spectral features (spectral bands and VIs) yielded good overall (higher than 80%) and healthy class (higher than 85%) classification accuracies using the QDA-based algorithm. The SIMCA-based algorithm yielded good average citrus greening class classification accuracy (higher than 83%) using selected spectral features. Thus, the present study demonstrates the applicability of utilizing spectral features for detection of greening in citrus. 相似文献
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Sabine Tanios Alieta Eyles Robert Tegg Calum Wilson 《American Journal of Potato Research》2018,95(3):248-257
Greening is a major cause of quality loss in potato tubers. As underground stems, potato tubers are non-photosynthetic plant organs that lack photosynthetic machinery. However, after light exposure, amyloplasts convert to chloroplasts in tuber peripheral cell layers, which cause the accumulation of the green photosynthetic pigment, chlorophyll. Tuber greening can be impacted by genetic, cultural, physiological and environmental factors including planting depth, tuber physiological age, temperature, atmospheric oxygen levels, and lighting conditions. Numerous studies have been devoted to understand and control this costly defect for the potato industry. This review brings together the available knowledge on light-induced greening, from causes to solutions and suggestions on further research with a focus on identifying the underlying mechanisms of tuber greening. 相似文献