荒漠化监测与防沙治沙法

我国于 2 0 0 1年 8月颁布了《中华人民共和国防沙治沙法》,把我国防沙治沙法律化 ,标志着我国防沙治沙工作从此进入法制化轨道。荒漠化监测是正确评价荒漠化的基础 ,是制定荒漠化防治规划的前提 ,同时发布预警预报 ,避免和减轻灾害所造成损失 ,为环境保护提供依据 ,也是参与国际交流与合作的基础。沙化土地监测报告制度是防沙治沙法的一项重要制度 ,依照荒漠化监测原则 ,定期实施荒漠化土地宏观监测、重点地区监测和典型监测     

Temperature Relations of Germination in Acer platanoides L. Seeds

The aim of this study was to describe the effect of temperature on the germination response of Acer platanoides L. seeds and the possible influence of dormancy. Moist chilled seeds (fruits) from eight trees were germinated at eight constant temperatures from 3 to 32C for 30 days. The highest germination was obtained at temperatures below 10C and the highest rate of germination was between 22 and 28C. The critical lower temperature for germination was estimated to be -2.6C, and the critical upper temperature between 30 and 35C. Temperatures above 10-15C increasingly inhibited the germination of seeds. Some of the non-germinated seeds were able to germinate after a second chilling period, possibly as a consequence of further release of primary dormancy and an indicated secondary dormancy. Seed survival decreased with increasing temperatures above 15C. The rate of germination was correlated with the accumulated thermal time at suboptimal temperatures. In conclusion, a constant temperature of 10C is recommended for testing the germination of seeds of A . platanoides.     

牙皂优良无性系选择研究

在枣庄、邹城、临沂等地现存的1万余株20~300年生牙皂大树中,筛选出大穗月牙、小月牙、丰月牙等优良单株3株,分别在邹城市、山亭区、滕州市等地进行生长量、产量、适应性、稳定性比较试验。试验结果显示,3个优良无性系的产量超过对照20%~42%,药用价值高于对照。     

门源地区油菜施用"四合一"有机颗粒肥的效果初报

门源地区油菜基施“四合一”有机颗粒肥的试验结果表明,以基施“四合一”有机颗粒肥750kg.hm-2和1125kg.hm-2的效果较好,较对照分别增产435kg.hm-2和499.95kg.hm-2,增产率分别为42.86%和49.25%,施肥利润分别增加2875.2元.hm-2和2662.5元.hm-2;施用“四合一”有机颗粒肥的小区翌年后茬种植青稞也有显著的增产作用,以基施“四合一”有机颗粒肥750kg.hm-2和1125kg.hm-2的效果较佳,较对照分别增产1249.5kg.hm-2和1599kg.hm-2,增产率分别为136.6%和141%。经综合分析,“四合一”有机颗粒肥推荐施用量为750kg.hm-2。