海巴戟研究进展

海巴戟(Morinda citrifolia Linn.),茜草科巴戟天属植物,产于南太平洋热带诸岛,我国海南、西沙和台湾有分布.为玻利尼西亚土著民重要传统药用植物,其叶、根、皮和未成熟果实均能治疗疾病.美国生化学者威罗夫·海尼克博士发现其含有极强抗氧功效,商业上引起广泛关注.尤其是近年,研究发现海巴戟果汁有抗癌的可能性后,海巴戟得到了越来越广泛的应用,在国内外,域内已有研究所开始重视,目前,我国虽极少科技文章发表,略见滞后,最近海南省投资六千万人民币建设产业,可知其重要程度.     

水稻旱育秧技术

介绍了水稻育秧技术,包括苗床选择与准备、种子准备、播种、秧田管理、化学除草和病虫害防治等方面内容．以期为水稻旱育秧提供参考。     

海南香草兰园土壤酸化现状及酸化原因分析

通过对海南主要香草兰园土壤采样分析,结果表明海南香草兰园土壤酸化趋势严重,土壤酸化主要原因是酸雨和几种化学酸性肥料的长期施用。     

丽水市滩圩引种雷竹试验初报

在丽水市滩圩经过几年的引种雷竹试验,现已初具规模,生长良好,据此提出今后在滩圩引种发展雷竹的成功经验,应注意做好造林地、造林季节的选择,改良土壤,做好抗旱防涝等措施。     

北京西山春季侧柏游憩林内挥发物成分及其日变化规律

The research adopts open sampling method and TCT-GC/MS (Thermodesorption Cold Trap-Gas Chromatography/Mass Spectrometery) apparatus to collect and analyze the volatile organic compounds(VOCs) of Platycladus orientalis forest, with the intention of researching the compounds and diurnal variation of VOCs of P. orientalis forest in natural state in Beijing Western Hills in spring. The results are as follows: (1) There are 160 kinds (11 categories) of volatile organic compounds, containing Alkyl Hydrocarbon, Ketone, Alcohol, Acid, Aldehyde, Alkene, Ester, Aromatic hydrocarbon, Ether, Hydroxybenzene and Amide. The content of Alkyl Hydrocarbon, Ketone, Acid and Aldehyde occupy a greater percentage among all compounds. (2) The diurnal variation curve of total volatile organic compounds (TVOC) is characterized as "one peak at 11:00(36.44%) and one vale at 3:00(12.76%)". Generally, the concentration at daytime is higher than that of night, and higher in morning than in afternoon, with the maximum at noon. (3) The change of Alkyl Hydrocarbon concentration is greater in the morning and about midday, less in the afternoon and night. The diurnal variation curve of Ketone concentration appears as "three peaks and three vales". 1:00, 5:00—7:00 and 11:00 are peak time, 3:00, 9:00 and 17:00 are vale time. As to Acid, its concentration appears two obvious phases: the higher phase is from 9:00 to 17:00, with the maximum at 11:00, and the lower phase is from 19:00 to 7:00, with the minimum at 5:00. Concerning Aldehyde concentration, 17:00 and 19:00 are the higher phases and also has obvious difference with other time, while the lower phrase has no obvious difference with each other. (4) Alkene is the most important compound to human health. Its concentration appears as "one peak" at 15:00, which has obvious difference with other time. Totally, its content at daytime is higher than that at night, and higher in afternoon than in morning.     

富路“领头凤”

江苏省东海县石榴镇新庄村女青年李玲利创业发家不忘众乡亲，积极带领周围众姐妹共同致富，今年以采，她投资11万元．购置40多台机械，创办了毛衣加工厂．先后吸纳48名女工进厂做工，每人每月收入1000元以上。图为女工们在加工毛衣。     

广西河池核桃示范园区土壤养分状况对比与分析

以广西凤山县、巴马县的4个核桃示范园为研究对象,采用"S"形取样法采集土壤样品,测定土壤pH、有机质、氮、磷、钾、硼含量等指标,比较分析其土壤养分状况,以期为核桃合理施肥提供参考依据。结果表明:4个核桃核心示范区土壤pH为6.52～7.38,土壤偏中性;土壤有机质含量为39.50～48.90 g·kg^-1,含量均较丰富;全氮、碱解氮含量分别为2.06～3.74 g·kg^-1、209.29～381.00 mg·kg^-1,土壤中氮素很丰富;有效磷含量为4.90～111.70 mg·kg^-1,其中坡茶村示范园含量最高,陇碰村示范园次之,而巴优村与弄者村示范园含量极少;速效钾含量为73.00～259.00 mg·kg^-1,坡茶村和陇碰村示范园含量较高,均大于200 mg·kg^-1,而弄者村示范园含量较低,仅73.00 mg·kg^-1;土壤有效硼含量为0.07～1.40 mg·kg^-1,坡茶村示范园有效硼含量最大,为1.4...     

蔬菜经纪人赵永宽

江苏省东台市东台镇蟒河村村民种蔬菜开始于上世纪90年代前期，当时一家一户种植的蔬菜都是自己送市场，交通不便，路途又远，费工费力。遇到市场行情不好，只能眼睁睁地看着蔬菜烂在田里。菜农们为此很伤脑筋，这时赵永宽从外面打工回来，他在苏南打过工，见识广。脑子活，当起了蔬菜经纪人，他把村里一家一户种植的蔬菜收集起来，推向市场，取得了很好的经济效益。