蝇蛆粉对矮脚黄鸡生长性能和屠宰性能的影响     

任静雷  吴银宝  林金荣 《中国家禽》2011,33(1):8-11

研究在矮脚黄鸡日粮中添加蝇蛆粉对其生长性能、屠宰性能和肉质性状的影响,评价蝇蛆粉作为肉鸡日粮蛋白质来源的可行性.试验选取8日龄体重相近的矮脚黄公鸡315只,随机分为对照组、4%鱼粉组和4.44%蝇蛆粉组,每组3个重复.分小鸡(8～21日龄)、中鸡(22～42日龄)和大鸡阶段(43～63日龄)测定各组试验鸡生长性能指标,...  相似文献   

Responses of fruit growth,quality, and productivity to crop load in apple cv. Ultra Red Gala/MM111     

J.A. Yuri  J. González Talice  J. Verdugo  A. del Pozo 《Scientia Horticulturae》2011

The effects of three crop load densities (4, 6 and 8 fruit per cm² of the cross-section of each tree branch, BCSA) on fruit growth, yield, fruit quality and vegetative growth were studied in apples (Malus × domestica Borkh) Ultrared Gala/MM111, from the fourth leaf (2006–2007 season) to the sixth (2008–2009 season). The maximum fruit growth rate was reached between 90 and 108 days after full bloom (DAFB), with values above 2.6 g day⁻¹. Accumulated yields to the sixth leaf reached 181, 157 and 123 Mg ha⁻¹ in the high, medium and low crop loads, respectively. Mean fruit weight decreased with increasing fruit crop load but the yields of fruit weight over 194 g were similar in all crop loads; the highest crop load exceeded the lowest crop load by 18.8 and 27.5 Mg ha⁻¹ of fruit weight of more than 172 and 154 g, respectively. The yields of harvested fruit exceeding 75% with red coloring did not show major differences, while fruit classified as 50–75% with red coloring were less common in the low crop load. No major differences were found at the end of the study in vegetative growth in the different seasons, nor in plant size. The reduction in mean fruit weight and in the percentage of fruit with good coloring was compensated by the increase in yields, thus not resulting in an effective reduction in the quality of the harvested fruit. The level of plant development reached with a semi-vigorous rootstock and high fruit loads allowed obtaining high fruit yield earlier and of good quality.  相似文献   

Partial rootzone drying maintains fruit quality of ‘Golden Delicious’ apples at harvest and postharvest     

Jorge A. Zegbe  Alfonso Serna-Pérez 《Scientia Horticulturae》2011

Partial rootzone drying (PRD) has been evaluated at harvest, but its effects on apple fruit postharvest life is little known for apples grown in semi-arid regions. The objective of this study was to test the hypothesis that water savings via PRD may affect fruit quality at harvest and postharvest-life of ‘Golden Delicious’ apples grown in a semi-arid region. The experiment was conducted from 2005 to 2007. The irrigation treatments were commercial irrigation as control (CI) and PRD. After 3 years of evaluation, fruit quality at harvest, measured as fruit weight, flesh firmness, and total soluble solids concentration, was similar between CI fruit and PRD fruit. Dry matter concentration (DMC) was higher in PRD fruit than in CI fruit in 2005. The fruit quality after 18 days storage at room temperature (13–18 °C and 51–56% relative humidity) was similar between CI fruit and PRD fruit. The DMC was the highest in PRD fruit in the 2005 and 2007 growing seasons, and tended to be higher in PRD fruit than in CI fruit in 2006. Total soluble solids concentration was ≈8.7% higher in PRD fruit than in CI fruit in 2007. Fruit weight loss was similar between treatments. This study suggests that water deficit via PRD did not damage fruit quality at harvest or after storage at room temperature. Additionally, PRD irrigation saved about 3240 m³ of water per hectare. Therefore, PRD can be recommended for commercial use in semi-arid regions and to those growers interested in either long-term storage or distant markets.  相似文献   

Response of watersprout growth to fruit load and intensity of dormant pruning in peach tree     

C. Bussi  C. Bruchou  F. Lescourret 《Scientia Horticulturae》2011

Watersprout occurrence and growth were investigated over a two-year period in an early maturing peach cultivar (Alexandra) under different intensities of dormant pruning for fruited and defruited trees. A preliminary study focused on identifying the laws that determine the probability of presence and occurrence of watersprouts in relation to watersprout-bearing shoot (WBS) length. The increase in watersprout probability of presence and occurrence resulting from greater WBS length illustrated the high capacity of peach for sprouting. Watersprout lengths were measured, as well as the lengths of young shoots, one-year-old fruit-bearing shoots (FBSs) and older branches considered as WBS in order to evaluate total shoot growth within the tree. Watersprout number and total length tended to be higher under severe dormant pruning and in fruited trees than under light dormant pruning and in defruited trees. This stimulation of watersprout length appeared to compensate for the concomitant lower total length of young shoots, resulting in a constant overall vegetative growth rate for the whole tree. In the second year of the experiment, watersprouts were either removed by summer pruning or not in order to evaluate watersprout incidence on the rest of the tree. After light and severe watersprout removal (WSR), the annual diametrical growth of FBS tended to be higher and lower, respectively, compared to trees not submitted to summer pruning. Light WSR might favour light interception in the centre of the canopy, thus improving assimilate production and allocation to FBS, whereas severe WSR could prevent carbohydrate export from watersprouts to FBS. Under our conditions, the limit at which WSR intensity became detrimental for FBS diametrical growth appeared to be after approximately 75% of the watersprouts were removed. Severe WSR appeared likely to improve fruit diameter, whereas it had no significant impact on the percentage of soluble solids.  相似文献   

Effect of pollination intensity,frequency and pollen source on fig (Ficus carica L.) productivity and fruit quality     

Badii Gaaliche  Mehdi Trad  Messaoud Mars 《Scientia Horticulturae》2011

Yield and fruit quality in fig (Ficus carica L.) are highly dependent on cultural practices especially caprification (pollination). However, this technique remains not well controlled in Tunisia. This study was conducted during two successive years, 2009 and 2010, to investigate different pollination conditions, i.e. number of caprifigs and repetitions of caprification on fruiting of two cultivars Bouhouli (San Pedro type) and Zidi (Smyrna type). In addition, the efficiency of four pollen sources was evaluated to identify the most effective pollinator for female cultivar Zidi. The following parameters were recorded: fruit number per shoot, fruit set, productivity, fruit characteristics and vegetative growth.  相似文献   

嫁接对西瓜抗性和品质的影响及其机理研究进展   总被引：2，自引：0，他引：2  

王日升 《长江蔬菜》2011,(24):1-5

重点介绍了嫁接对西瓜抗病性、耐寒性、耐盐性、耐旱性、耐涝性和品质的影响及其机理的研究进展,并对嫁接技术的发展前景和今后的研究方向进行了展望.  相似文献   

核果类果树主要性状遗传变异规律研究进展   总被引：4，自引：0，他引：4  

孙猛  刘威生  刘宁  王晓松 《北方果树》2011,(6):1-5

该文综述了核果类果树主要性状的遗传趋势,主要包括植物学性状、生物学性状,果实经济性状等方面的遗传规律研究,以期为核果类果树杂交育种中亲本的选配提供理论依据。同时,对今后的研究方向提出建议。  相似文献   

果业信息元数据分布式体系设计与模型构建     

刘彦花 《计算机与农业》2008,(5):31-33

广西拥有丰富的水果资源,水果种类繁多,种植规模逐年增大,然而果农经常出现增产不增收的现象,加强果业信息的流通才是解决问题的关键。在网络迅速发展的背景下,探讨果业信息元数据分布式体系,尝试构建果业信息元数据管理系统结构模块,有助于实现果业信息的快速传播和获取理念,推进广西水果产业的可持续发展。  相似文献   

浸钙对猕猴桃果实硬度变化影响的生化机制   总被引：41，自引：2，他引：39  

王贵禧  韩雅珊 《园艺学报》1995,22(1):21-24

猕猴桃果实在贮藏过程中硬度下降分为两个明显的阶段，第一阶段硬度下降较快，主要与淀粉的快速水解有关，由于采后浸钙不能有效地降低淀粉酶的活性，因而钙处理对第一阶段硬度下降的影响不大。第二阶段的硬度下降主要与果胶物质的水解有关，钙处理后的果实，多聚半乳糖醛酸酶（ＰＧ）的活性降低，非水溶性果胶物质的降解及水溶性果胶物质的上升速度变慢，从而有效地减缓了果实的软化速度。钙处理对猕猴桃果实的ＡＣＣ氧化酶及纤维素酶的活性没有明显的影响。  相似文献   

果树线虫病害调查和防治     

张绍升 《果树学报》1996,(1)

１９８８－１９９３年在福建省主要果树栽培区调查果树线虫病。从果树根部和根际土壤中查出植物线虫２１属，其中根结线虫（Ｍｅｌｏｉｄｏｇｙｎｅ），根腐线虫（Ｐｒａｔｙｌｅｎｃｈｕｓ），穿孔线虫（Ｒａｄｏｐｈｏｌｕｓ），肾状线虫（Ｒｏｔｙｌｅｎｃｈｕｌｕｓ），剑线虫（Ｘｉｐｈｉｎｅｍａ），毛刺线虫（Ｔｒｉｃｈｏｄｏｒｕｓ）和拟毛刺线虫（Ｐａｒａｔｒｉｃｈｏｄｏｒｕｓ）对果树有一定为害。试验结果表明，利用抗线虫果树和砧木品种、改良土壤、施用杀线虫剂等措施能有效防治果树线虫病。  相似文献