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为探索瘠薄干旱条件下纸浆林的栽培技术,选用4个杨树良种无性系,设计5种密度和4种整地、栽植深度,进行造林试验。结果表明:在平原沙地采用抗旱耐瘠薄的优良杨树品种(鲁伊莎等),深栽70cm,适当密植(2m×3m),前两年实行林粮间作,以耕代抚,第3、4年雨季前各追施一次化肥,5a生林分总蓄积可达77.41~182.56m3/hm2,净产值可达2620.5~7300.5元/(hm2·a),其经济效益为纯农业的2.67~7.85倍。因此,有计划地发展杨树短轮伐期纸浆林,在技术和经济上都是可行的。
In order to explore the cultivation technology of pulp forest in infertile conditions, 4 poplar clones were selected to design five kinds of density and four kinds of soil preparation and planting depth for afforestation experiment. The results showed that the fine poplar varieties (Luisa, etc.) with drought-resistant and infertile barrenness were planted in the plain sandy land. The planting depth was 70cm and the density was 2m × 3m. The intercropping of forest and grain was carried out in the first two years, , Four years before the rainy season each topdressing a chemical fertilizer, the total volume of 5 a forest can reach 77.41 ~ 182.56m3 / hm2, the net output value of up to 2620.5 ~ 7300.5 yuan / (hm2 · a), its economic benefits For pure agriculture 2.67 ~ 7.85 times. Therefore, it is technically and economically feasible to develop poplar short-rotation pulpwood in a planned manner.