红壤新开地牧草基肥效应研究

本试验针对红壤新开地的特点，对５个抗旱、耐酸、耐瘠牧草品种进行了基肥效应的研究，结果表明：红壤新开地施用基肥能促进牧草出苗、生长、刈割、再生，并提高产量，其中有机肥效果最好。不同品种对基肥的反应有较大的差异，冬季俄勒冈黑麦草、徐苕３号，夏季杂交狼尾草、印尼大绿豆可作为红壤新开地的先锋作物。

适宜低丘红壤新开地的牧草品种初步研究

为了选择适宜红壤新开地种植的牧草品种，对９个冬季、５个夏季和６个多年生牧草品种进行了比较研究。通过产量、生长特性、抗逆性等试验，选择出若干个适合低丘红壤新开地种植的牧草品种。

新开地乡马铃薯新品种繁育和推广需求分析

马铃薯产业化是调整产业结构，进一步增加山区农民收入的重要途径．但是．长期以马铃薯因使用块茎做种子．体积大．也不易储藏，影响了马铃薯新品种的讯速更新和推广。而种子不能及时的得到更换。出现品种严重退化。严重制约了马铃薯产量的提高。加速培育和科学引进和推广马铃薯优良品种，是马铃薯产业化发展过程中的迫切需要。

A new species of extinct genus Lycopodites from Lower to Middle Jurassic sediments of Irkutsk coal basin (Eastern Siberia)

In Jurassic sediments of Siberia, remains of Lycopodites are rare in occurrence. They are represented by two species ： Lycopodites tenerrimus Heer, and L. （.9） trichiatus Pryn. This paper presents an emended diag- nosis of the species L.（.9） trichiatus Pryn., and the descriptions of two new species： Lycopodhes subulifolius sp. nov., and L. baikalensis sp. nov. from the Early-Middle Jurassic sediments of the Irkutsk coal basin, Eastern Siberia, Russia. As part of the research effort, it was found that the ecological preference of the new species was different： Lycopodites subulifolius sp. nov. grew in wet and open spaces, while Lycopodites baikalensis sp. nov. preferred to colonize young growth of bog forests.