CAJ | 학술논문

通过借用退化沙荒地附近种源地土壤种子库的客土方式，分析客土＋保水剂、客土2种不同措施对退化沙荒地土壤改良和植被恢复的作用，为沙荒地植被自然恢复与重建技术提供理论依据。结果表明：①种子库物种以多年生草本植物为主，且双子叶植物居多，未发现乔灌木植物种子，种子密度是种源地（1524．64粒／m2）＞沙荒地（843．76粒／m2）。②土壤有机质、全氮、全磷、全钾、碱解氮、速效磷、速效钾含量在0～10 cm土层内表现为：客土＋保水剂＞客土＞沙荒地，在10～20 cm和20～40 cm土层内3种处理样地无明显差异。③客土和客土＋保水剂处理地，其地上和地下生物量均远高于沙荒地，客土地的生物量（937．80 g／m2）是沙荒地生物量（287．11 g／m2）的3．27倍。但根冠比是沙荒地（1．85）＞客土（1．69）＞客土＋保水剂（1．04），说明土壤干旱在某种程度上利于植物根系的发育。④不同改良措施下草本Margalef指数和Shannon－wiener指数，客土＋保水剂＞客土＞沙荒地；Pielou指数和Simpson指数是客土地与客土＋保水剂处理地之间相差不大，但都明显高于沙荒地。
통과차용퇴화사황지부근충원지토양충자고적객토방식，분석객토＋보수제、객토2충불동조시대퇴화사황지토양개량화식피회복적작용，위사황지식피자연회복여중건기술제공이론의거。결과표명：①충자고물충이다년생초본식물위주，차쌍자협식물거다，미발현교관목식물충자，충자밀도시충원지（1524．64립／m2）＞사황지（843．76립／m2）。②토양유궤질、전담、전린、전갑、감해담、속효린、속효갑함량재0～10 cm토층내표현위：객토＋보수제＞객토＞사황지，재10～20 cm화20～40 cm토층내3충처리양지무명현차이。③객토화객토＋보수제처리지，기지상화지하생물량균원고우사황지，객토지적생물량（937．80 g／m2）시사황지생물량（287．11 g／m2）적3．27배。단근관비시사황지（1．85）＞객토（1．69）＞객토＋보수제（1．04），설명토양간한재모충정도상리우식물근계적발육。④불동개량조시하초본Margalef지수화Shannon－wiener지수，객토＋보수제＞객토＞사황지；Pielou지수화Simpson지수시객토지여객토＋보수제처리지지간상차불대，단도명현고우사황지。
The Soil Seed Bank of adjacent provenance to the degraded wasteland was used to analyses the efficiency of 2 different treatments by new soil + SAP and new soil on the soil amelioration and vegetation restoration of the degraded sandy wasteland ,so as to provide theoretical basis for vegetation restoration and reconstruction technology . The results showed :① Seed bank species were composed of the dominative perennial herbaceous plants , with a majority of dicotyledons ,but without trees and shrubs seeds found .The seed density was 1 524 .64 seed/m2 in the provenance higher than 843 .76 seed/m2 in the sandy wasteland .② The content of soil organic matter ,Total N ,Total P ,Total K ,alkali‐hydrolyzable N ,a‐vailable P ,and available K in the 0~10 cm soil layer indicated new soil + SAP>new soil>sandy wasteland (CK) ,while in 10~20 cm and 20~40 cm soil layers ,there was no signifi‐cant difference in the three plots .③The ground and underground biomass treated by both new soil and new soil + SAP proved to be far higher than that of the sandy wasteland ,with new soil biomass of 937 .80g/m2 ,which was 3 .27 times as high as the sandy wasteland bio‐mass of 287 .11 g/m2 .But the shoot ratio of the 3 plots was 1 .85 of sandy wasteland > 1 .69 of new soil > 1 .04 of new soil + SAP ,which explains droughty soil promoted the root growth .④ The species diversity of herbaceous plants in different treatments showed Mar‐galef richness index and Simpson diversity index were both new soil + SAP> new soil >sandy w asteland .T here w as no difference in Pielou evenness index and Shannon‐Wiener di‐versity index between the treatments of new soil and new soil + SAP ,but they were still higher than that of sandy wasteland .