退耕还林地林草间作对林地土壤肥力和林木生长的影响  

Effect of Forest and Grass Intercropping on Soil Fertility and Tree Growth of Forestland Returned from Farmland

作　　者：文志宏 陵军成 WEN Zhi -hong;LING Jun -cheng(Hualong Station of Gansu Qilianshan National Nature Reserve Administration,Tianzhu Gansu 733299,China;Forestry Work Station of Tianzhu County,Tianzhu Gansu 733299,China)

机构地区：[1]甘肃祁连山国家级自然保护区管理局华隆自然保护站,甘肃天祝733299 [2]甘肃省天祝县林业工作站,甘肃天祝733299

出　　处：《青海农林科技》2018年第4期34-37,共4页Science and Technology of Qinghai Agriculture and Forestry

摘　　要：为了提高退耕还林地经济效益和管理水平,实现林草和林牧双赢,在退耕还林地青海云杉行间间作黑麦草。结果表明:退耕还林地间作黑麦草后明显提高了林地土壤有机质、速效氮和速效钾含量,降低了土壤p H值,促进了林木生长,提高了鲜草产量。不同退耕还林地间作黑麦草后0～30cm土壤有机质、速效氮、速效钾含量,青海云杉树高、冠幅,鲜草产量平均值分别为1. 72g/kg、85. 14mg/kg、280. 16mg/kg、1. 73m、1. 64m、4366. 97kg/667m2,较对照(CK)分别提高了49. 57%、46. 36%、97. 45%、14. 57%、22. 39%、98. 27%,p H平均值为8. 19,较对照(CK)降低了0. 85%。因此,建议有条件的退耕还林地间作牧草来促进林木生长和提高林地效益。In order to increase economic benefit and management level of forestland returned from farmland,get harvest of forest,grass and animal,Lolium perenne L were intercropped between Picea crassifolia kom on forestland returned from farmland. The result showed that organic matter content,available nitrogen content and available potassium content of soil were increased obviously,the p H was decreased,the growth of Picea crassifolia kom was improved,and the yield of Lolium perenne L was increased. The average value of organic matter content,available nitrogen content and available potassium content of soil 0-30 cm,the height and crown of Picea crassifolia kom,the yield of Lolium perenne L were 1. 72 g/kg,85. 14 mg/kg,280. 16 mg/kg,1. 73 m,1. 64 m and 4366. 97 kg/667 m2 separately,which increased 49. 57%,46. 36%,97. 45%,14. 57%,22. 39%,98. 27% compare to CK,the average value of pH was 8. 19,which decreased 0. 85% compare to CK. Therefore,grass intercropped between trees of forestland returned from farmland was suggested to improve tree growth and increased forest income.

关 键 词：林草间作 土壤肥力 林木生长 影响 

分 类 号：S344[农业科学—作物栽培与耕作技术]