雷竹引种栽培试验研究

雷竹引种栽培时,移栽母竹应用3种方法进行处理.其一用黄泥浆溶液进行处理,二是吲哚丁酸溶液处理,三是ABT 3号生根粉溶液处理.栽培后,对母竹3种处理的试验,苗木生根长鞭、成活率、出笋率、生长量进行观察分析.结果表明,用ABT 3号生根粉溶液浸泡的母竹栽培,比吲哚丁酸和黄泥浆溶液处理的生根长鞭分别提高29%、45%,成活率分别提高4%和7%,出笋率分别提高52%、64%.     

千叶兰耐荫性的研究

千叶兰(Muehlewbeckiacomplera)是2002年从国外引入的一种室内垂吊观叶花卉。本文对千叶兰耐荫性做了实验研究。在不同的光照强度(0.14-946.00靘olm-2s-1)条件下设置五个试验区域。在试验区培养40天后,用LI-COR6400测定其功能叶的光合特性,绘制光-光合作用曲线,计算光补偿点、光饱和点及最大净光合速率,测定其叶面积与叶片数的生长量。实验结果表明:千叶兰生长在光照强度为9.26-569.00靘olm-2s-1(463-28150lx,16-22℃,RH46%-60%)时较适宜,光合效率最高,生长最佳。千叶兰的光照习性属于较喜光,但忌光照强度为569.00靘olm-2s-1以上的强光直射。虽然千叶兰具有耐半荫性,但在光照强度为0.16-19.22靘olm-2s-1(8-961lx)的条件下(晴天每天光照强度达10靘olm-2s-1,光照时间为6小时以上),才能够生长新叶。表4参8。     

Folklore medicinal plants of North Andaman Islands, India

The rural folk of North Andaman, India use the traditional medicine for their primary health care. Folklore medicinal uses of 72 interesting medicinal plant species along with botanical name, local name, family, habit, part used, disease for which the drug is administrated, mode of administration are presented. These 72 plant species which provide the crude drugs pertain to 67 genera and 43 families of Magnoliophyta from tropical rainforests. These plants used to cure 40 ailments. Most remedies were taken orally, accounting for 76% of medicinal use. Most of the remedies were reported to have been from trees (55.6%) and herb (22.2%) species. The most widely sought after plant parts in the preparation of remedies in the areas are the stem bark (33.8%) and root (23.9%).     

A new phenolic compound from Nigella damascena seeds

A new phenolic ester has been isolated from the seeds of Nigella damascena and the structure was established as 1-O-(2,4-dihydroxy)phenylacetyl glycerol (1) by 1H and 13C-NMR spectral data and EI-MS analysis.     

Insekten-Einschlußpräparate aus Polyesterharzpräparate aus Polyesterharz

Ohne Zusammenfassung     

Bestandeszuwachs und Leistungsvergleich montan-subalpiner Lärchen-Fichten-Mischbestände

Ohne Zusammenfassung     

Deroceras laeve Müll. (Mollusca: Limacidae), ein Eiräuber von Pegomyia betae Curt. (Muscidae)

Observations on the predacious activity of Deroceras laeve Müll. (Mollusca: Limacidae)on eggs of Pegomyia betae Curt.(Muscidae) and Epilachna varivestis Muls.(Coccinellidae). Deroceras laeve was observed feeding on eggs ofPegomyia betae in the laboratory and in the field. Since little is known about predacious behaviour of species of Limacidae, tests were conducted on the food preferences in two sets of experiments: (1) eggs ofP. betae on sugar beet leaves and (2) eggs ofEpilachna varivestis on bush bean leaves. Eggs ofP. betae were preferred over sugar beet leaf tissue (Fig. 1 and 2). The results showed that the slugs in addition to feeding on the eggs consume small amounts of the surrounding plant surface tissue. The feeding on eggs, however, was not considered to be accidential, because on leaves lacking eggs or on leaves with decreasing number of eggs,D. laeve fed predominantly on the tissue of the leaf margin. In the other set of experiments withE. varivestis the slugs were also found feeding on eggs, but showed a higher preference for plant tissue when compared with P. betae (Table 1).     

Wood destroying fungi in Iran

This paper gives information on 76 species of wood destroying fungi, collected in Iranian forests and from logs and board in sawmills. The majority of the records are new and are mentioned here for the first time.