本文選題：CT技術(shù)　切入點(diǎn)：土壤孔隙結(jié)構(gòu)　出處：《西南農(nóng)業(yè)學(xué)報(bào)》2017年08期

【摘要】：【目的】開展不同耕作措施下土壤孔隙結(jié)構(gòu)研究,為土地合理耕作及耕地水土保持提供參考�！痉椒ā恳詮V西甘蔗地為研究對象,在常規(guī)耕作和三年免耕條件下,利用CT(Computed tomography)掃描技術(shù),通過相關(guān)插件計(jì)算獲得甘蔗地土壤孔隙數(shù)量、孔隙體積和表面積,土壤彎曲度、孔隙連通性和水力半徑等孔隙結(jié)構(gòu),并進(jìn)行三維重建和可視化�！窘Y(jié)果】耕作區(qū)的孔隙面密度大于免耕作區(qū);耕作區(qū)的孔隙度均值(1.069%)和孔隙數(shù)均值(1194個(gè))都小于免耕區(qū)的孔隙度均值(1.195%)和孔隙數(shù)均值(1519個(gè));由彎曲度和連通性的均值數(shù)據(jù)可知,耕作區(qū)(1.374、0.512)大于免耕作區(qū)(1.333、0.299)。翻耕破壞土壤原有結(jié)構(gòu),導(dǎo)致土壤中的大孔隙數(shù)量和孔隙度減少,但增加中小孔隙的數(shù)量。使得在二維分布中耕作區(qū)的孔隙面密度大于免耕區(qū),而在土壤表層三維形態(tài)特征中免耕區(qū)土壤孔隙較耕作區(qū)分布更密集;翻耕破除了土壤孔隙之間的孤立性,增加了土壤的連通性,使得耕作區(qū)的彎曲度、連通性大于免耕區(qū)�！窘Y(jié)論】適當(dāng)耕作比免耕有助于土壤內(nèi)部的連通和導(dǎo)水,促進(jìn)作物吸水以減少土壤水分流失。
[Abstract]:[objective] to study the soil pore structure under different tillage measures in order to provide a reference for rational tillage and soil and water conservation of cultivated land. [methods] taking sugarcane field in Guangxi as the research object, under the condition of conventional tillage and no-tillage for three years,By using CT(Computed tomographic scanning technique, the pore structure, such as soil pore quantity, pore volume and surface area, soil curvature, pore connectivity and hydraulic radius, were calculated by relevant plug-in.The density of pore surface in tillage area was higher than that in no-tillage area.The mean values of porosity and porosity in tillage area were less than that in no-tillage area (1.195) and the mean of porosity (1519), and the mean values of curvature and connectivity were higher than that of no-tillage area (1.3330.2990.3330.299), according to the mean value data of curvature and connectivity, the average value of porosity (1.069) and pore number (1194) were smaller than that of no-tillage area (1.195) and the mean value of porosity (1519) was higher than that in no-tillage area.Ploughing destroys the original structure of soil, resulting in the decrease of macroporosity and porosity, but the increase of the number of small and medium pores.The pore surface density of tillage area is larger than that of no-tillage area in two-dimensional distribution, and the soil pore density in no-tillage area is more dense than that in tillage area in the three-dimensional morphological characteristics of soil surface, and the isolation between soil pores is broken by tillage.The connectivity of soil was increased, and the curvature and connectivity of tillage area was higher than that of no-tillage area. [conclusion] proper tillage is more helpful than no-tillage to improve soil connectivity and water conductivity, promote crop water absorption to reduce soil water loss.
【作者單位】： 桂林理工大學(xué)廣西巖溶地區(qū)水污染控制與用水安全保障協(xié)同創(chuàng)新中心;桂林理工大學(xué)廣西環(huán)境污染控制理論與技術(shù)重點(diǎn)實(shí)驗(yàn)室;桂林理工大學(xué)環(huán)境科學(xué)與工程學(xué)院;廣西農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與環(huán)境研究所;廣西農(nóng)業(yè)科學(xué)院微生物研究所;
【基金】：國家自然科學(xué)基金項(xiàng)目(41501230,31360356) 廣西自然科學(xué)基金項(xiàng)目(2016GXNSFAA380197) 廣西農(nóng)業(yè)科學(xué)院基本科研業(yè)務(wù)專項(xiàng)項(xiàng)目(2015JZ34)
【分類號(hào)】：S152.5;S566.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 吳景社;用CT掃描器測定土壤結(jié)構(gòu)[J];灌溉排水;1988年04期

，

本文編號(hào)：1725145