侵蚀坡地果园草被残体量及其分解规律  

Quantity of Dead Grass and Its Decomposition Rule in Eroded Slope Orchards

作　　者：张汉荣[1] 李发林[1] 黄炎和 刘长全[1] 蔡志发[3] 

机构地区：[1]福建省热带作物科学研究所,福建漳州363001 [2]福建省农林大学资源与环境学院,福建福州350002 [3]漳州市水土保持办公室,福建漳州363000

出　　处：《热带农业科学》2005年第5期29-32,共4页Chinese Journal of Tropical Agriculture

摘　　要：对果园套种的牧草多年自然生长后其季末残体的量及其分解规律的研究表明:生长季末宽叶雀稗活体部分(地上活体和根)占大部分,为55.72%,残体占44.28%;从N、P、K、Ca、Mg的元素含量来看,N和K活体>根>残体、P根>活体>残体、Ca和Mg残体>活体>根;残体的N、P、K浓度都小于活体;元素N、P、K的贮量大小都为活体>残体>根,而Ca、Mg的贮量大小都为残体>活体>根,N贮量在活体、残体、根中分别占总量的42.95%、38.91%、18.14%,P为40.99%、29.54%、29.47%,K为60.36%、22.58%、17.06%,Ca为35.43%、55.19%、9.38%和Mg为34.59%、49.92%、15.49%;残体N、K易流失养分且含量变化剧烈。Studies of the quantity of dead grass and its decomposition rule after interplanting pasture （Paspalum wettsteinii Hackel） in orchards in eroded slopes and naturally growing for several years showed that the living body of the pasture including the aerial living body and roots accounted for the most part 55.72% and the dead body accounted for 44.28%. The contents of N, P, K, Ca, Mg were as follows： N and K in aerial living body 〉 root 〉 the dead body, P in root 〉 aerial living body 〉 the dead body, Ca and Mg in the dead body 〉 aerial living body 〉 root. Contents of N, P, K in the dead body were lower than those in the living body. Nutrient accumulation of N, P, K in the aerial living body 〉 the dead body 〉 root. Nutrient accumulation of Ca, Mg in the dead body 〉 aerial living body 〉 root. Nutrient accumulation in the aerial living body, the dead body and root were N 42.95%, 38.91%, 18.14% respectively, P 40.99%, 29.54%, 29.47% respectively, K 60.36%, 22.58%, 17.06% respectively, Ca 35.43%, 55.19%, 9.38% respectively and Mg 34.59%, 49.92%, 15.49% respectively. N, K in the dead body lost easily and changed sharply.

关 键 词：侵蚀坡地 果园草被 残体量 分解规律 

分 类 号：S688.4[农业科学—观赏园艺]