物探化探计算技术
物探化探計算技術
물탐화탐계산기술
COMPUTING TECHNIQUES FOR GEOPHYSICAL AND GEOCHEMICAL EXPLORATION
2014年
3期
342-346
,共5页
周斯建%赵印泉%彭培好%孙传敏
週斯建%趙印泉%彭培好%孫傳敏
주사건%조인천%팽배호%손전민
川芎%Cd%Pb%耕作方式%土壤
川芎%Cd%Pb%耕作方式%土壤
천궁%Cd%Pb%경작방식%토양
Ligusticum chuanxiong%Cadmium%Lead%tillage methods%soil
以彭州川芎种植区的菜园土、稻田翻耕土、稻田免耕土和旱地（未种过川芎和蔬菜）四种土壤为研究对象，探讨了不同耕作方式下川芎对土壤中Cd、Pb 的富集特征。结果表明：在四种耕作方式下，菜园土中Cd、Pb 含量显著高于其他三种土壤，分别为1．10 mg·kg-1和29．78 mg ·kg-1；土壤Cd综合污染指数和Hacanson系数分别为3．76和133．07，处于重污染和强生态危害状态。稻田翻耕土、稻田免耕土和旱地三种类型土壤在Cd 含量上差异显著，依次为稻田免耕土（0．86 mg·kg-1）＞稻田翻耕土（0．59 mg·kg-1）＞旱地（0．37 mg·kg--1），在Pb 含量上三者差异不显著。川芎植株对Cd的富集在菜园土中显著高于其他土壤，表现为菜园土＞稻田免耕土＞旱地＞稻田翻耕土；川芎植株对Pb 的富集以在稻田免耕土中最大，依次为稻田免耕土＞旱地＞稻田翻耕土＞菜园土。在四种土壤中，川芎叶片对Cd、Pb 的富集能力均大于根茎，其中川芎叶片对Cd的富集能力是根茎的1．37倍，对Pb 的富集能力是根茎的1．42倍，二者对Cd的富集能力在菜园土中差异最大（叶/根为1．56），对Pb 的富集能力在稻田免耕土中差异最大（叶/根为1．98）。川芎对Cd、Pb 的富集主要受轮作作物种类和耕作措施的影响。
以彭州川芎種植區的菜園土、稻田翻耕土、稻田免耕土和旱地（未種過川芎和蔬菜）四種土壤為研究對象，探討瞭不同耕作方式下川芎對土壤中Cd、Pb 的富集特徵。結果錶明：在四種耕作方式下，菜園土中Cd、Pb 含量顯著高于其他三種土壤，分彆為1．10 mg·kg-1和29．78 mg ·kg-1；土壤Cd綜閤汙染指數和Hacanson繫數分彆為3．76和133．07，處于重汙染和彊生態危害狀態。稻田翻耕土、稻田免耕土和旱地三種類型土壤在Cd 含量上差異顯著，依次為稻田免耕土（0．86 mg·kg-1）＞稻田翻耕土（0．59 mg·kg-1）＞旱地（0．37 mg·kg--1），在Pb 含量上三者差異不顯著。川芎植株對Cd的富集在菜園土中顯著高于其他土壤，錶現為菜園土＞稻田免耕土＞旱地＞稻田翻耕土；川芎植株對Pb 的富集以在稻田免耕土中最大，依次為稻田免耕土＞旱地＞稻田翻耕土＞菜園土。在四種土壤中，川芎葉片對Cd、Pb 的富集能力均大于根莖，其中川芎葉片對Cd的富集能力是根莖的1．37倍，對Pb 的富集能力是根莖的1．42倍，二者對Cd的富集能力在菜園土中差異最大（葉/根為1．56），對Pb 的富集能力在稻田免耕土中差異最大（葉/根為1．98）。川芎對Cd、Pb 的富集主要受輪作作物種類和耕作措施的影響。
이팽주천궁충식구적채완토、도전번경토、도전면경토화한지（미충과천궁화소채）사충토양위연구대상，탐토료불동경작방식하천궁대토양중Cd、Pb 적부집특정。결과표명：재사충경작방식하，채완토중Cd、Pb 함량현저고우기타삼충토양，분별위1．10 mg·kg-1화29．78 mg ·kg-1；토양Cd종합오염지수화Hacanson계수분별위3．76화133．07，처우중오염화강생태위해상태。도전번경토、도전면경토화한지삼충류형토양재Cd 함량상차이현저，의차위도전면경토（0．86 mg·kg-1）＞도전번경토（0．59 mg·kg-1）＞한지（0．37 mg·kg--1），재Pb 함량상삼자차이불현저。천궁식주대Cd적부집재채완토중현저고우기타토양，표현위채완토＞도전면경토＞한지＞도전번경토；천궁식주대Pb 적부집이재도전면경토중최대，의차위도전면경토＞한지＞도전번경토＞채완토。재사충토양중，천궁협편대Cd、Pb 적부집능력균대우근경，기중천궁협편대Cd적부집능력시근경적1．37배，대Pb 적부집능력시근경적1．42배，이자대Cd적부집능력재채완토중차이최대（협/근위1．56），대Pb 적부집능력재도전면경토중차이최대（협/근위1．98）。천궁대Cd、Pb 적부집주요수륜작작물충류화경작조시적영향。
Four types of soil with different previous crops as leaf vegetable,rice (no-tillage and conventional tillage)and other crops were studied to explore characteristics of cadmium (Cd)and lead (Pb)accumulation in Ligusticum chuanxiong.Results show that after different tillage methods,the concentrations of Cd and Pb in vegetable soil were much higher than the other three ones with 1. 10 mg·kg-1 of Cd and 29. 78 mg·kg-1 of Pb.The indexes of Nemerow Pollution and Hacanson of Cd in the soil were 3.76 and 133.07 which indicated that the current situation of the soil was in danger of heavy metal pollution by Cd. Contents of Cd were significantly different among the remain types and showing an order of no-tillage soil(0. 86 mg·kg-1 )>conventional tillage soil(0.59 mg.kg-1 )>dry land (0. 37 mg·kg-1 )while contents of Pb were not .The enrichment for Cd in vegetable soil was the highest one compared with the others and show the order of vegetable soil > conventional tillage soil >dry land >no-tillage soil from the entire plant.Otherwise,the plant accumulated much more Pb in no-tillage soil than oth-ers and show a different order as no-tillage soil> dry land > conventional tillage soil> vegetable soil.In the four types of soil,the biological concentration factor in leaves of Ligusticum chuanxiong was 1.37 times higher than the rhizomes for Cd and was 1.42 times for Pb.The maximum as 1.56 of the former was in the vegetable soil and the one (1.98)of the latter was in no-tillage soil.Contents of the elements in soil were effected by previous crop species and farming methods mostly.
