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评价了10个多功能树种--阿江榄江树(Terminalia arjuna)、印楝(Azadirechta indica)、牧豆树(Prosopis juliflora)、水黄皮(Pongarnia pin-nata)、木麻黄(Casuarina equisetifolia)、角豆树(Prosopis alba )、阿拉伯金合欢(Acacia nilotica)、细叶桉(Eucalyptus tereticornis)、牛蹄豆(Pithecellobium dulce)、铁刀木(Cassia siamea )等10年间的生物量和生物能产量,这些树种采用单种栽培的农作方式种植于印度北部恒河平原苏打土壤。该地区土壤紧密、盐碱化、透水性差、营养匮乏。10个树种中,细叶桉植株最高,牧豆树和木麻黄次之。阿拉伯金合欢林分基面积为3.04m2·hm-2,植株胸径优于其他树种,牧豆树和木麻黄植株胸径次之。10年间,牧豆树和Acacia nilotica分别产出生物量56.50和50.75 Mg·hm-2,而阿拉伯金合欢、水黄皮和角豆树生物量产出量较小。牧豆树的营养需求和净生物量产出均最大,而且叶片中营养元素(N,P,K,Ca和Mg)含量较高。然而,树种间木质成分差异较小。以每吨木材营养元素产出量计算,氮素在阿拉伯金合欢中产出量最低,磷和钾分别在阿江榄仁树和牛蹄豆中产出最低,钙和镁在牧豆树中产出最低。牧豆树生物质能产量最高1267.75 GJ·hm-2,阿拉伯金合欢次之1206 GJ·hm-2,印楝最低(520.66GJ·hm-2)。图2表7参31。
Ten multifunctional species were evaluated - Terminalia arjuna, Azadirechta indica, Prosopis juliflora, Pongarnia pin-nata, Casuarina equisetifolia, , Prosopis alba, Acacia nilotica, Eucalyptus tereticornis, Pithecellobium dulce, Cassia siamea and other 10-year biomass and biomass production These species are cultivated on a monoculture crop in the soda soil of the Ganges plains in northern India. The soil in the area is tight, salinized, poorly water permeable and nutrient deficient. Of the 10 tree species, Eucalyptus urophylla plants were the highest, followed by Meadow and Casuarina. Acacia forest base area of 3.04m2 · hm-2, plant diameter is better than other tree species, followed by the diameter of the herbage and casuarina plantation. In 10 years, the biomass of A. pastoris and Acacia nilotica were 56.50 and 50.75 Mg · hm-2, respectively, while that of A. acacia, A. hupehensis and C. carolina were smaller. The nutrition requirement and net biomass yield of the adzuki bean were the largest, and the content of nutrients (N, P, K, Ca and Mg) in leaves was higher. However, there is little difference in wood composition among the species. In terms of the output of nutrient elements per tonne of wood, the yield of nitrogen was the lowest in Acacia borealis, while the output of phosphorus and potassium was the lowest in Areia jalapa and Astragalus mongolica, and the lowest in Cassia tree . The yield of biomass of Meadow Tree was 1267.75 GJ · hm-2, 1206 GJ · hm-2 followed by Acacia, the lowest was 520.66GJ · hm-2. Figure 2 Table 7 参 31.