摘要
人工营造的防护林存在纯胶泥地块、植被稀疏问题,形成“天窗或漏洞”,影响防护效益。通过对纯黏土地整地,分别调查不同层次土壤水分含量、补植苗木生长状况,掌握补植不同整地深度对土壤水分分布的影响,探究在干旱荒漠化地区纯胶泥地块补植造林覆土保墒技术,提高荒漠区植被覆盖率,提升森林防护效益。结果表明:①穴深越大打坑用时越多;②前2次浇灌水量与穴深成正比,灌水量依次为T_(3)>T_(2)>T_(1);③T_(2)生长量增长幅度最大,补植效果最佳;④造林生长量差异T_(2)和T_(3)较T_(1)多1倍;⑤覆土量对补植苗木生长影响较大,N_(3)>N_(2),明显高于N_(1);⑥栽植后灌水2~3次最佳。通过试验得出,适合于民勤黏土地成本最低、补植效果最佳的补植定植穴深度为60 cm,为石羊河流域黏土地植被恢复与治理提供参考依据。
The artificial shelterbelt has the problems of pure clay plots and sparse vegetation,which forms"skylights or loopholes"and affects the protection efficiency.Through land preparation of pure clay land,soil moisture content at different levels and the growth status of supplementary planting seedlings were investigated,so as to master the influence of different depth of supplementary planting on soil moisture distribution,explore the supplementary planting technology of afforestation and soil conservation in pure clay plots in arid and desertification areas,improve the vegetation coverage rate in desert areas,and enhance the forest protection efficiency.The results showed that:①The larger the hole depth,the more time it takes to make the hole.②The water quantity of the first two times was proportional to the hole depth,and the irrigation quantity was in the order of T_(3)>T_(2)>T_(1).③The increase of T_(2) growth rate was the largest,and the effect of replanting was the best.④The difference of afforestation growth in T_(2) and T_(3) was twice as much as that in T_(1).⑤The amount of soil cover had a great effect on the growth of supplementary seedlings,with N3>N_(2) and obviously higher than N_(1).⑥After planting,irrigation 2~3 times is the best.The results showed that the depth of planting hole suitable for Minqin sticky land with the lowest cost and the best planting effect was 60cm,which provided a reference for vegetation restoration and management of sticky land in Shiyanghe basin.
作者
盛强文
陈珍新
梁盛山
富雅琼
陆红梅
Sheng Qiangwen;Chen Zhenxin;Liang Shengshan;Fu Yaqiong;Lu Hongmei(Shiyanghe Forest Farm,Wuwei 733399,Gansu,China)
出处
《农业技术与装备》
2023年第4期79-82,共4页
Agricultural Technology & Equipment
关键词
整地深度
黏土
土壤水分
困难立地条件
人工补植
land preparation depth
clay
soil moisture
difficult site conditions
artificial replanting
