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OALib Journal期刊
ISSN: 2333-9721
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间作苜蓿对毛白杨纸浆林生长和地力的影响
DOI: 10.3969/j.issn.1000-2006.2013.04.008, PP. 39-44
Keywords: 三倍体毛白杨,纸浆林,间作,紫花苜蓿,地力
Abstract:
在宽窄行(2m×1.5m+8m)栽植模式下,分析了间作紫花苜蓿(m1)对三倍体毛白杨纸浆林生长和地力的影响。结果表明:间作紫花苜蓿4a后,纸浆林林木平均胸径、树高、单株材积与林分蓄积总生长量较间作棉花、小麦宽窄行栽植模式(m2)增长了6.04%、2.53%、13.33%与12.07%,较传统纸浆林栽植模式(m3)增长了28.18%、26.47%、70.00%与10.27%;m1、m2、m3处理下,0～60cm各土层有机质、全氮、碱解氮含量与间作前相比都有不同程度的提高,而3种模式之间比较,m1、m2土壤有机质、全氮、碱解氮、速效钾含量高于m3;在比较经济效益后发现,m1模式4a的总净收入最高,达到78043.56元/hm2,较m2、m3分别提高了3.97%和38.73%。因此,可以在相似立地条件地区大规模推广间作紫花苜蓿的经营模式。
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