不同秋眠类型苜蓿品种生产性能与持久性分析

通过对58份不同秋眠类型苜蓿品种再生性、持久性和产草量在呼和浩特的测定分析,结果表明:1)在全部参试材料与秋眠类型组中,苜蓿秋眠级和再生性正相关并达到极显著、显著水平;而在半秋眠类型组、非秋眠类型组中,苜蓿的再生性和秋眠级相关性很小。2)在全部参试材料、半秋眠类型组、非秋眠类型组中,首蓿的持久性与秋眠级负相关,但是在秋眠类型组中,首蓿秋眠级和持久性相关性很小。3)在全部参试材料、半秋眠类型组、非秋眠类型组中,苜蓿的产草量和秋眠级负相关;在秋眠类型组中,苜蓿的产草量和秋眠级正相关但不显著。     

光系列葡萄品种在福州地区的引种表现

为丰富福建葡萄品种资源结构,2014年起国家葡萄产业技术体系福州综合试验站引进河北省农林科学院昌黎果树研究所选育的‘春光’、‘蜜光’、‘宝光’、‘峰光’等4份优良鲜食葡萄品种,对其植物学特性、物候期、果实性状、生长结果习性及抗病性等进行观察,总结其在福建的综合表现。结果表明：4个欧美杂交葡萄品种较现有主栽品种巨峰具有坐果稳定、着色成熟一致、果肉硬脆耐储等优势,适宜在福建地区推广种植。     

栽植密度对甜樱桃光合特性、产量和果实品质的影响

本研究以四川汉源地区的甜樱桃新品种‘拉宾斯’为试材,对比分析了不同栽植密度（3.5m?.0m、4.0m?.5m和4.0m?.0m）下甜樱桃光合特性、产量和品质的差异。研究结果表明,4.0m?.5m栽植密度下,甜樱桃‘拉宾斯’光合能力、产量和果实品质表现最优,4.0m?.0m次之,3.5m?.0m最弱。该研究结果为甜樱桃新品种‘拉宾斯’在当地的推广提供了理论依据。     

Predicting the Dairy Cow Somatic Cell Number of Ningxia Area Based on ARIMA Model

Through dairy herd improvement (DHI) data analysis to predict somatic cell count (SCC) of Ningxia area in time, which providing a reference for the prevention and treatment of mastitis in dairy cows, making the DHI data more effective and timely in guiding the dairy industry production. Using the difference method to make the average cow somatic cell data form September 2011 to February 2016 stabled, then used the seasonal ARIMA model to analysis, fitting and forecasting data. The auto.arima function of R software had been used to calculate the optimal time series that finally confirmed the model was ARIMA (1,1,0)(1,1,0)_[12], AIC was -3.67. The Acf test showed that the residual had no significant autocorrelation; Ljung-Box test showed that all P-value>0.5, indicating that the residual was white noise, and this model could be used to make predication for the next 24 months. The forecast function of the R software was used to predict the dairy cows SCC from March 2016 to February 2017, and the forecast map was drawn. The predicted results showed that the SCC of the entire Ningxia area were showing a downward trend. The SCC would be the least in January 2017,and the predictive value was about 253 100 per mL. It would be the largest in March 2016, was about 439 600 per mL. The results also showed that the dairy cows SCC in Ningxia was higher than the critical value of 20 million of subclinical mastitis. It suggested that the prevention and treatment of dairy cow mastitis need to be strengthened in Ningxia area. At the same time, if the data of the dairy cows SCC was added in timely, the data model should be updated to make it more close to the true value, which would be more meaningful to the actual instruction.     

43个柑橘品种（品系/株系）受枸橘潜叶甲为害程度调查研究

采取随机抽样法,调查枸橘潜叶甲对枳、柚、柑、桔、甜橙、枸椽、杂柑及金柑等8大类共43个品种（品系/株系）为害虫情指数,其结果表明,不同柑橘种类或不同柑橘品种或品系均可受枸橘潜叶甲为害,但为害的程度存在着差异性,枳、柚受害最重,金柑、桔、杂柑类受害最轻,对其差异产生的原因亦作了初步分析。     

Yield and mineral content of ten enset (<Emphasis Type="Italic">Ensete ventricosum</Emphasis>) varieties

A study was conducted to evaluate the macro and trace mineral contents of ten enset varieties collected from Sidama zone of southern Ethiopia. Samples of leaf lamina, leaf midrib, pseudostem and corm were taken from ten enset varieties at the age of 5 to 6 years during the main rainy season. The dry weight of each variety and fraction were also determined. Mineral contents in fractions of different enset varieties were analysed and compared with nutrient requirements of ruminants. The contribution of different enset fractions to the total dry weight was variable (P < 0.05), the highest being from pseudostem and the lowest from leaf lamina. There were varietal differences (P < 0.05) in macro and trace mineral content in different fractions except phosphorus (P) content of leaf lamina. Most enset fractions were rich sources of major minerals such as P, potassium (K), calcium (Ca) (except corm) and magnesium (Mg). Sodium (Na) content was very low. Most fractions were rich in iron (Fe) and manganese (Mn), but deficient in copper (Cu), except leaf lamina. Zinc (Zn) content was high in corm, but low in other fractions. This account of the macro and trace mineral content of different enset varieties and fractions could help in strategic supplementation intended to alleviate mineral deficiencies.     

AACV-Rose等三个国外香蕉品种在海南试种初报

分别对AACV-Rose、TMBX-1378、Cachaco三个国外香蕉品种的植株、吸芽、叶片、花穗、果实进行描述,旨在为下一步的多点试种提供前期数据参考。     

不同授粉品种对‘灿烂’兔眼蓝莓着果率与果实性状的影响

以‘天赐五号’、‘天赐八号’、‘蓝金’和‘奥尼尔’等4个蓝莓品种作为授粉品种,对‘灿烂’兔眼蓝莓进行异花授粉,以‘灿烂’兔眼蓝莓自花授粉为对照,研究了不同授粉品种对着果率、果实品质和果实外观性状的影响,以期为‘灿烂’兔眼蓝莓生产栽培选择适宜授粉树提供科学依据。研究结果表明：4个授粉品种与‘灿烂’间都具良好的亲和性,对着果率、可溶性固形物含量、花色苷、总酸含量、单果重、纵径、横径、果形指数、萼洼、果蒂、萼片、果形和果梗分离等性状均有显著影响。虽然‘天赐八号’授粉后着果率显著低于‘天赐五号’、‘蓝金’,但其着果率仍可以达到70%以上,同时其可溶性固形物含量、花色苷、总酸含量、单果重、纵径、横径、果形指数等亦显著优于其他授粉品种,这表明‘天赐八号’为‘灿烂’最佳授粉搭配品种。     

3个不同香蕉抗病品种（系）的农艺性状及产量初步比较

香蕉枯萎病是引起香蕉产业全球毁灭性的病害,目前尚未有有效、彻底的根治方法,培育抗病品种是防治枯萎病的重要措施之一。本研究对3个香蕉抗病新品种（系）进行比较试验,调查了其生物学特性、农艺性状、产量及发病率。结果表明,‘南天黄’和‘桂抗2号’之间差异不显著,与‘中蕉9号’差异显著。‘南天黄’的生育期最短为383 d、‘桂抗2号’为393 d、‘中蕉9号’生育期最长,达447 d;‘南天黄’和‘桂抗2号’的农艺性状差异不显著,株型较矮,平均假茎高度分别为285 cm和298 cm,‘中蕉9号’假茎高平均为340 cm;‘南天黄’和‘桂抗2号’的果指数为21个左右,果型类似‘巴西蕉’且大小适中,‘中蕉9号’果指数为16个,果型直、大;‘中蕉9号’产量最高,平均单穗重24.9 kg,‘南天黄’株单穗重接近‘桂抗2号’,分别为23.5 kg和23.2 kg;试验中,‘南天黄’没有发病,发病率为0,‘桂抗2号’发病率为0.6%,‘中蕉9号’发病率为4.7%。综上所述,‘南天黄’和‘桂抗2号’更适合作为抗病品种（系）,可进一步展开大面积示范工作。     

棉花品种间苗期钾吸收效率的差异研究

在水培条件下研究了转基因抗虫棉中棉所41和常规棉中棉所36、中棉所35三个品种苗期钾吸收效率的差异及其机制.结果表明,在营养液中钾浓度为0.5 mmol·L-1,可使棉花幼苗生长速率达到最高生长速率80%左右的条件下,中棉所35和中棉所41在6～7叶期的生物量和体内钾吸收量显著高于中棉所36.中棉所35的吸钾量多主要与其根系活跃吸收表面积大有关;中棉所41的吸钾量多可能是相对较大的根系活跃吸收表面积和相对较高的Imax综合作用的结果.中棉所36的Imax虽然显著高于其它两个品种,但体内钾累积量却比较低,这与其较小的根系活跃吸收表面积有关,该品种体内较高的钾浓度也可能对吸收产生反馈抑制作用.在本试验条件下,转基因抗虫棉中棉所41的苗期钾吸收能力与常规棉相比并不低.