24小时热门版块排行榜    

查看: 510  |  回复: 0

lff200831505

新虫 (小有名气)

[求助] 土壤粒径分离

大家好,我看了一些英文文献,可不是很明白他们到底是使用的什么仪器做到土壤粒径分离的,In triplicates, the fine earth was separated into 5 particle-size
fractions using a two-step sample dispersion for minimization
of artefacts (Amelung and Zech, 1999). First, ultrasonic
dispersion with an energy input of 60 J ml−1 and a pressureabove 5 g (Amelung and Zech, 1999) was carried out on 30 g
amounts of soil in 150 ml of deionized water. The energy input
of the sonicator (Branson W 450) was calibrated according
to North (1976). After separation of the coarse sand fraction
(250–2000 μm) by wet-sieving, the remaining suspension
(300 ml) was treated ultrasonically (440 J ml−1) at a soil to
water ratio of 1:10 (v/v) for additional dispersion of more stable
microaggregates. The fine sand (63–250 μm) was isolated by
wet-sieving. The silt (2–63 μm) and clay (b2 μm) fractions
were gained by centrifugation of the remaining suspension at
40 ×g. This allowed the silt to be settled while the clay fraction
stayed suspended and was decanted into a suitable container.
The sediment was resuspended in 300 ml of water and
centrifuged again. This procedure was repeated at least 15
times until the supernatant remained clear after centrifugation.
All fractions were dried at 40 °C.希望有做这方面的朋友能告知谢谢
回复此楼
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

智能机器人

Robot (super robot)

我们都爱小木虫

相关版块跳转 我要订阅楼主 lff200831505 的主题更新
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[基金申请] 售SCI一区文章,我:8O5.5.1.O5.4,科目全,可伽急 +4 ELBZ6WwEaRj6 2026-11-04 8/400 2026-11-05 20:45 by qL1cU46YIdK0
[考研] 售SCI一区文章,我:8.O.551.O.5.4,科目全,可伽急 +3 ELBZ6WwEaRj6 2026-11-04 8/400 2026-11-05 20:43 by qL1cU46YIdK0
[硕博家园] 售SCI一区文章,我:8.O.55.1.O.54,科目齐全,可伽急 +3 ELBZ6WwEaRj6 2026-11-04 9/450 2026-11-05 20:34 by qL1cU46YIdK0
[公派出国] 售SCI一区文章,我:8.O.551.O.5.4,科目全,可伽急 +4 ttH3f1oA6ace 2026-11-04 8/400 2026-11-05 20:23 by qL1cU46YIdK0
[硕博家园] 售SCI-T0P文章,我:8O.5.5.1.O.54,科目齐全,可+急 +3 ttH3f1oA6ace 2026-11-04 8/400 2026-11-05 20:21 by qL1cU46YIdK0
[公派出国] 售SCI一区T0P文章,我:8O.55.1.O.5.4,科目齐全,可+急 +5 ncTVBM6AOJHF 2026-11-04 12/600 2026-11-05 20:10 by qL1cU46YIdK0
[考博] 售SCI一区T0P文章,我:8.O.55.1.O.5.4,科目全,可+急 +6 ncTVBM6AOJHF 2026-11-04 9/450 2026-11-05 20:10 by qL1cU46YIdK0
[考博] 售一区SCI文章T0P,我:8O.551.O54,科目全,可十急 +3 ttH3f1oA6ace 2026-11-04 6/300 2026-11-05 18:00 by My20PsvIExYO
[考研] 售SCI-T0P文章,我:8O.5.5.1.O.54,科目齐全,可+急 +3 ttH3f1oA6ace 2026-11-04 11/550 2026-11-05 17:58 by My20PsvIExYO
[硕博家园] 售SCI一区T0P文章,我:8O.55.1.O.5.4,科目齐全,可+急 +5 kvewwGtKktqB 2026-11-04 13/650 2026-11-05 17:47 by My20PsvIExYO
[考博] 售SCI一区T0P文章,我:8.O.55.1.O54,科目全,可伽急 +3 kvewwGtKktqB 2026-11-04 8/400 2026-11-05 17:47 by My20PsvIExYO
[考博] 售SCI一区T0P文章,我:8.O55.1.O.54,科目全,可十急 +5 ncTVBM6AOJHF 2026-11-04 14/700 2026-11-05 17:36 by My20PsvIExYO
[考研] 售SCI一区T0P文章,我:8O.55.1.O.5.4,科目齐全,可+急 +5 ncTVBM6AOJHF 2026-11-04 10/500 2026-11-05 17:36 by My20PsvIExYO
[硕博家园] 售SCI一区文章,我:8.O.551.O.5.4,科目全,可伽急 +4 ncTVBM6AOJHF 2026-11-04 9/450 2026-11-05 17:26 by My20PsvIExYO
[硕博家园] 售SCI一区文章,我:8O5.5.1.O5.4,科目全,可伽急 +3 ncTVBM6AOJHF 2026-11-04 9/450 2026-11-05 17:25 by My20PsvIExYO
[公派出国] 售SCI-T0P文章,我:8O.5.5.1.O.54,科目齐全,可+急 +3 ELBZ6WwEaRj6 2026-11-04 7/350 2026-11-05 16:08 by My20PsvIExYO
[考研] 售SCI一区T0P文章,我:8.O55.1.O.54,科目全,可十急 +3 ttH3f1oA6ace 2026-11-04 9/450 2026-11-05 15:46 by My20PsvIExYO
[公派出国] 售SCI-T0P文章,我:8O.5.5.1.O.54,科目齐全,可+急 +5 ncTVBM6AOJHF 2026-11-04 9/450 2026-11-05 15:13 by My20PsvIExYO
[教师之家] 售SCI一区T0P文章,我:8O.55.1.O.54,科目全,可伽急 +4 ncTVBM6AOJHF 2026-11-04 12/600 2026-11-05 11:10 by PYZmcHr5kSaq
[基金申请] 各位基础老师们,看完中央《从严治党》的决定后,对学术界更加有信心了吧 +5 iaeyuan 2026-11-01 5/250 2026-11-04 14:43 by jinchengzi
信息提示
请填处理意见