为探讨评价三峡库区紫色土旱坡地土壤肥力及土壤质量的生物学指标,本试验研究了三峡库区典型水土保育模式——桑树护坡对土壤微生物生物量碳氮的影响。试验共设横坡农作、双边桑树+横坡农作、等高桑树+双边桑树+横坡农作及四边桑树+等高桑树+横坡农作4个处理。结果表明,不同坡长及桑树布局间土壤微生物生物量碳氮差异显著;双边桑树+横坡农作处理能够显著降低土壤微生物生物量氮对土壤氮库的贡献,使土壤微生物生物量碳平均提高23.43 mg·kg-1;而四边桑树+等高桑树+横坡农作处理却能够显著降低土壤微生物商,使土壤微生物生物量氮平均提高21.81 mg·kg-1。此外,在横坡农作处理中土壤微生物生物量碳氮与土壤碳氮具有极显著相关性,而在旱坡地桑树系统中,土壤微生物生物量碳氮与土壤碳氮相关性大多不显著。由此可知,旱坡地农桑配置模式在一定程度上可以提高土壤微生物生物量碳氮,但不同桑树布局对土壤微生物生物量碳氮在三峡库区紫色土旱坡地桑树系统中的维持能力并不一致,将微生物生物量碳氮作为紫色土旱坡地土壤质量演变的评价指标值得商榷。

To explore the biological indices of soil fertility and quality evaluation of purple arid hillside field in the Three Gorges Reservoir of China, the contents of soil microbial carbon (SMBC) and soil microbial nitrogen (SMBN) in crop-mulberry agro-forest system in purple arid hillside field in the Three Gorges Reservoir was studied. The study used the arid hillside crop field protected by mulberry as a typical soil and water conservation mode to determine the biological indices of soil fertility and quality. The experiment consisted of four treatments, which were CT treatment (crops were planted along transverse slope), T1 treatment (crops were planted along transverse slope with mulberry trees on upper-slope and lower-slope), T2 treatment (crops were planted along transverse slope with mulberry trees on upper-slope, middle-slope and lower-slope);T3 treatment (crops was planted along transverse slope with mulberry trees on middle-slope and the four sides of the slope. The results showed

为全面了解构树和桑树对绿化混凝土的适应性,以构树和桑树为试验材料,研究了随机多孔绿化混凝土和土壤环境下两种植物的叶绿素含量、光合特征、叶绿素荧光特性和单根抗拉能力。结果表明,构树比桑树更能适应绿化混凝土环境,通过适度浇水,桑树也能够适应绿化混凝土环境;绿化混凝土中生长的构树和桑树生长情况均劣于在土壤中,但两种植物根系在绿化混凝土中更为发达,侧根须根多且长,根系形态不同;不同生长环境下构树和桑树的根系弹塑性有显著差异,绿化混凝土环境下构树的根系抗拉强度大于桑树,且绿化混凝土环境下构树和桑树的根系抗拉强度和延伸性均显著大于土壤中的。

The chlorophyll content,photosynthesis characteristics,chlorophyll fluorescence feature and tensile ability of single root of paper mulberry and mulberry under random porous afforestation concrete and soil environments were determined to study the adaptability under the afforestation concrete environment.The results showed that the adaptability of paper mulberry was higher than mulberry under the afforestation concrete environment and mulberry could grow under the afforestation concrete environment by watering properly.The growth situation of mulberry and paper mulberry under the afforestation concrete environment was worse than that under the soil environment but their developed root system was of more and longer lateral and fibrous roots.The tensile strength of the root system of paper mulberry was higher than mulberry under the afforestation concrete environment and the tensile strength and extensibility of the root system of paper mulberry and mulberry under the afforestation concr

介绍了我国桑树资源的分布情况和桑叶、桑枝、桑木、桑椹、桑白皮的药用价值,简述了桑树生物体在医药行业中的研究进展,并对桑树资源在医药行业上的开发应用前景进行了展望。

This paper introduces the distribution of mulberry cultivation in china .This paper reviews the mulberry resources of the medicinal value and the application in the pharmaceutical industry .Finally ,it Summary the mul-berry resources in development and application prospect of pharmaceutical industry .

重金属污染修复已成为当前国际环境科学研究的热点问题,利用桑树修复土壤重金属污染也是一种有效的植物修复技术。笔者简单介绍了土壤重金属与植物修复技术的概念,并阐述了桑树的生长特性,桑树生长与土壤中镉、铅、锌、砷等重金属元素的关系,并结合江西省土壤重金属污染的形势,探讨了桑树作为江西省土壤重金属污染修复树种的潜力。

Remediation of heavy metals has become a hot topic of international environmental science, and remedying the heavy metal contaminated soils with mulberry was an effective phytoremediation technology. This paper briefly introduced the concept of heavy metals in soil and phytoremediation technology, described the growth characteristics of mulberry, and mulberry growing relationship with Cd, Pb, Zn, As and other heavy metals pollution. Combined with the heavy metals pollution situation in Jiangxi Province, and discussed the potential of repair tree in soil heavy metal pollution with mulberry.

为探索贵州喀斯特山区石漠化治理与草地生态畜牧业协调发展的新途径,在贵州省赫章县采用不同种植模式研究葛藤与桑树治理石漠化的效果。结果表明：通过对植被覆盖度、鲜叶产量、土壤抗蚀性、土壤孔隙度、田间最大持水量和土壤渗透系数等11个指标进行模糊综合评分,各处理综合得分依次为葛藤（密度为2 667株/667m2,0.779 2）〉葛藤＋桑树（密度为2 667株/667m2,0.718 4）〉桑树（密度为2 667株/667m2,0.590 7）〉葛藤（密度为667株/667m2,0.352 8）〉葛藤＋桑树（密度为667株/667m2,0.338 5）〉桑树（密度为667株/667m2,0.284 1）〉葛藤（密度为296株/667m2,0.265 6）〉葛藤＋桑树（密度为296株/667m2,0.257 8）〉桑树（密度为296株/667m2,0.212 1）。结论：石漠化治理应以单独种植葛藤（密度为2667株/667m2）为主,以葛藤＋桑树（密度为2 667株/667m2）的种植模式为辅。

In order to explore a new harmonious development path of stony desertification management and ecological animal husbandry in Guizhou karst mountainous area,the governance effects of kudzu and mulberry on stony desertification were studied by using different cropping patterns in Hezhang County of Guizhou Province.Results:the comprehensive scores followed the sequence of kudzu (2 6 6 7 plants/6 6 7 m2,0.779 2)>kudzu+mulberry(2 667 plants/667 m2,0.718 4)>mulberry(2 667 plants/667 m2, 0.590 7)>kudzu (667 plants/667 m2,0.352 8)>kudzu+mulberry (667 plants/667 m2,0.338 5)>mulberry(667 plants/666.7 m2 ,0.284 1)>kudzu (296 plants/667 m2 ,0.265 6)>kudzu+mulberry (296 plants/667 m2 ,0.257 8)>mulberry(296 plants/667 m2 ,0.2121).Conclusion:The stony desertification management should be dominated by planting kudzu(2 667 plants/667 m2 )and supplemented by planting kudzu+mulberry(2 6 6 7 plants/6 6 7 m2 ).