间作苜蓿对毛白杨纸浆林生长和地力的影响  

The effect of intercropping alfalfa on growth and soil productivity of Populus tomentosa pulpwood plantation

作　　者：黄祥丰[1] 向地奎 贾黎明[1] 高园园[1] 席本野[1] 王烨[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083 [2]重庆市万州区林木种子站,重庆404000

出　　处：《南京林业大学学报（自然科学版）》2013年第4期39-44,共6页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家林业公益性行业科研专项重大项目(201004004);北京林业大学"985"优势学科创新平台开放基金(000-1108003)

摘　　要：在宽窄行(2 m×1.5 m+8 m)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4 a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,0～60 cm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4 a的总净收入最高,达到78 043.56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。In order to efficiently apply alfalfa in the cultivation of Populus tomentosa pulpwood plantations under the wide-and-narrow planting pattern, a field experiment was conducted to investigate the effects of pattern M1, M2 and M3 on growth and soil productivity of P. tomentosa pulpwood plantations for 4 years. M1 represented the pattern of inter- cropping alfalfa, M2 represented the pattern of intercropping cotton and wheat, M3 represented the traditional pattern of pulpwood plantation. Results showed that M1, on average, increased the total increment of DBH, height, individual volume and stand volume by 6.04% , 2.53% , 13.33% and 12.07% respectively over M2, while that of M1 was 28. 18% , 26. 47% , 70. 00% and 10.27% higher than M3. The contents of soil organic, total N and available N of M1, M2 and M3 were increased to some extent in the 0 - 60 em soil layer. For understanding the difference of soil fertil- ity among M1, M2 and M3, we analyzed the contents of soil organic, total N, available N and available K, and found that M3 was the least than M1 and M2 in above nutrient. Considering the economic benefit of M1, M2 and M3, we found that the total net income of M1 was the highest, which reached 78 043.56 yuan/hm2 and was 3. 97% and 38.73% higher than M2 and M3 respectively. In conclusion, our findings suggested that M1 should be vigorously pro- moted in regions similar to our experimental plantation.

关 键 词：三倍体毛白杨 纸浆林 间作 紫花苜蓿 地力 

分 类 号：S792.117[农业科学—林木遗传育种] S714.6[农业科学—林学]