农(Nong)用(Yong)地(Di)：(?)指(Zhi)耕(Geng)地(Di)（(?)水(Shui)田(Tian)、(?)水(Shui)浇(Jiao)地(Di)、(?)旱(Han)地(Di)）(?)、(?)园(Yuan)地(Di)（(?)果(Guo)园(Yuan)、(?)茶(Cha)园(Yuan)）(?)、(?)草(Cao)地(Di)（(?)天(Tian)然(Ran)牧(Mu)草(Cao)地(Di)、(?)人(Ren)工(Gong)牧(Mu)草(Cao)地(Di)）(?)。(?)

农(Nong)用(Yong)地(Di)土(Tu)壤(Rang)污(Wu)染(Ran)风(Feng)险(Xian)，(?)指(Zhi)因(Yin)土(Tu)壤(Rang)污(Wu)染(Ran)导(Dao)致(Zhi)使(Shi)用(Yong)农(Nong)产(Chan)质(Zhi)量(Liang)安(An)全(Quan)、(?)农(Nong)作(Zuo)物(Wu)生(Sheng)长(Chang)或(Huo)土(Tu)壤(Rang)生(Sheng)态(Tai)环(Huan)境(Jing)受(Shou)到(Dao)不(Bu)利(Li)影(Ying)响(Xiang)。(?)

农(Nong)用(Yong)地(Di)土(Tu)壤(Rang)污(Wu)染(Ran)风(Feng)险(Xian)筛(Shai)选(Xuan)值(Zhi)指(Zhi)农(Nong)用(Yong)地(Di)土(Tu)壤(Rang)中(Zhong)污(Wu)染(Ran)物(Wu)含(Han)量(Liang)等(Deng)于(Yu)或(Huo)者(Zhe)低(Di)于(Yu)该(Gai)值(Zhi)的(De),对(Dui)农(Nong)产(Chan)品(Pin)质(Zhi)量(Liang)安(An)全(Quan)、(?)农(Nong)作(Zuo)物(Wu)生(Sheng)长(Chang)或(Huo)土(Tu)壤(Rang)生(Sheng)态(Tai)环(Huan)境(Jing) 的(De)风(Feng)险(Xian)低(Di),一(Yi)般(Ban)情(Qing)况(Kuang)下(Xia)可(Ke)以(Yi)忽(Hu)略(Lue);超(Chao)过(Guo)该(Gai)值(Zhi)的(De),对(Dui)农(Nong)产(Chan)品(Pin)质(Zhi)量(Liang)安(An)全(Quan)、(?)农(Nong)作(Zuo)物(Wu)生(Sheng)长(Chang)或(Huo)土(Tu)壤(Rang)生(Sheng)态(Tai)环(Huan)境(Jing)可(Ke)能(Neng)存(Cun) 在(Zai)风(Feng)险(Xian),应(Ying)当(Dang)加(Jia)强(Qiang)土(Tu)壤(Rang)环(Huan)境(Jing)监(Jian)测(Ce)和(He)农(Nong)产(Chan)品(Pin)协(Xie)同(Tong)监(Jian)测(Ce),原(Yuan)则(Ze)上(Shang)应(Ying)当(Dang)采(Cai)取(Qu)安(An)全(Quan)利(Li)用(Yong)措(Cuo)施(Shi)。(?)

土(Tu)壤(Rang)污(Wu)染(Ran)原(Yuan)理(Li)

   进(Jin)入(Ru)土(Tu)壤(Rang)的(De)污(Wu)染(Ran)物(Wu)，(?)因(Yin)其(Qi)类(Lei)型(Xing)和(He)性(Xing)质(Zhi)的(De)不(Bu)同(Tong)而(?)主(Zhu)要(Yao)有(You)固(Gu)定(Ding)、(?)挥(Hui)发(Fa)、(?)降(Jiang)解(Jie)、(?)流(Liu)散(San)和(He)淋(Lin)溶(Rong)等(Deng)不(Bu)同(Tong)去(Qu)向(Xiang)。(?)重(Zhong)金(Jin)属(Shu)离(Li)子(Zi)，(?)主(Zhu)要(Yao)是(Shi)能(Neng)使(Shi)土(Tu)壤(Rang)无(Wu)机(Ji)和(He)有(You)机(Ji)胶(Jiao)体(Ti)发(Fa)生(Sheng)稳(Wen)定(Ding)吸(Xi)附(Fu)的(De)离(Li)子(Zi)，(?)包(Bao)括(Kuo)与(Yu)氧(Yang)化(Hua)物(Wu)专(Zhuan)性(Xing)吸(Xi)附(Fu)和(He)与(Yu)胡(Hu)敏(Min)素(Su)紧(Jin)密(Mi)结(Jie)合(He)的(De)离(Li)子(Zi)，(?)以(Yi)及(Ji)土(Tu)壤(Rang)溶(Rong)液(Ye)化(Hua)学(Xue)平(Ping)衡(Heng)中(Zhong)产(Chan)生(Sheng)的(De)难(Nan)溶(Rong)性(Xing)金(Jin)属(Shu)氢(Qing)氧(Yang)化(Hua)物(Wu)、(?)碳(Tan)酸(Suan)盐(Yan)和(He)硫(Liu)化(Hua)物(Wu)等(Deng)，(?)将(Jiang)大(Da)部(Bu)分(Fen)被(Bei)固(Gu)定(Ding)在(Zai)土(Tu)壤(Rang)中(Zhong)而(?)难(Nan)以(Yi)排(Pai)除(Chu)；(?)虽(Sui)然(Ran)一(Yi)些(Xie)化(Hua)学(Xue)反(Fan)应(Ying)能(Neng)缓(Huan)和(He)其(Qi)毒(Du)害(Hai)作(Zuo)用(Yong)，(?)但(Dan)仍(Reng)是(Shi)对(Dui)土(Tu)壤(Rang)环(Huan)境(Jing)的(De)潜(Qian)在(Zai)威(Wei)胁(Xie)。(?)化(Hua)学(Xue)农(Nong)药(Yao)的(De)归(Gui)宿(Su)，(?)主(Zhu)要(Yao)是(Shi)通(Tong)过(Guo)气(Qi)态(Tai)挥(Hui)发(Fa)、(?)化(Hua)学(Xue)降(Jiang)解(Jie)、(?)光(Guang)化(Hua)学(Xue)降(Jiang)解(Jie)和(He)生(Sheng)物(Wu)降(Jiang)解(Jie)而(?).终(Zhong)从(Cong)土(Tu)壤(Rang)中(Zhong)消(Xiao)失(Shi)，(?)其(Qi)挥(Hui)发(Fa)作(Zuo)用(Yong)的(De)强(Qiang)弱(Ruo)主(Zhu)要(Yao)取(Qu)决(Jue)于(Yu)自(Zi)身(Shen)的(De)溶(Rong)解(Jie)度(Du)和(He)蒸(Zheng)气(Qi)压(Ya)，(?)以(Yi)及(Ji)土(Tu)壤(Rang)的(De)温(Wen)度(Du)、(?)湿(Shi)度(Du)和(He)结(Jie)构(Gou)状(Zhuang)况(Kuang)。(?)例(Li)如(Ru)，(?)大(Da)部(Bu)分(Fen)除(Chu)草(Cao)剂(Ji)均(Jun)能(Neng)发(Fa)生(Sheng)光(Guang)化(Hua)学(Xue)降(Jiang)解(Jie)，(?)一(Yi)部(Bu)分(Fen)农(Nong)药(Yao)(有(You)机(Ji)磷(Lin)等(Deng))能(Neng)在(Zai)土(Tu)壤(Rang)中(Zhong)产(Chan)生(Sheng)化(Hua)学(Xue)降(Jiang)解(Jie)；(?)使(Shi)用(Yong)的(De)农(Nong)药(Yao)多(Duo)为(Wei)有(You)机(Ji)化(Hua)合(He)物(Wu)，(?)故(Gu)也(Ye)可(Ke)产(Chan)生(Sheng)生(Sheng)物(Wu)降(Jiang)解(Jie)。(?)即(Ji)土(Tu)壤(Rang)微(Wei)生(Sheng)物(Wu)在(Zai)以(Yi)农(Nong)药(Yao)中(Zhong)的(De)碳(Tan)素(Su)作(Zuo)能(Neng)源(Yuan)的(De)同(Tong)时(Shi)，(?)就(Jiu)已(Yi)破(Po)坏(Huai)了(Liao)农(Nong)药(Yao)的(De)化(Hua)学(Xue)结(Jie)构(Gou)，(?)导(Dao)致(Zhi)脱(Tuo)烃(Ting)、(?)脱(Tuo)卤(Lu)、(?)水(Shui)解(Jie)和(He)芳(Fang)环(Huan)烃(Ting)基(Ji)化(Hua)等(Deng)化(Hua)学(Xue)反(Fan)应(Ying)的(De)发(Fa)生(Sheng)而(?)使(Shi)农(Nong)药(Yao)降(Jiang)解(Jie)。(?)土(Tu)壤(Rang)中(Zhong)的(De)重(Zhong)金(Jin)属(Shu)和(He)农(Nong)药(Yao)都(Du)可(Ke)随(Sui)地(Di)面(Mian)径(Jing)流(Liu)或(Huo)土(Tu)壤(Rang)侵(Qin)蚀(Shi)而(?)部(Bu)分(Fen)流(Liu)失(Shi)，(?)引(Yin)起(Qi)污(Wu)染(Ran)物(Wu)的(De)扩(Kuo)散(San)；(?)作(Zuo)物(Wu)收(Shou)获(Huo)物(Wu)中(Zhong)的(De)重(Zhong)金(Jin)属(Shu)和(He)农(Nong)药(Yao)残(Can)留(Liu)物(Wu)也(Ye)会(Hui)向(Xiang)外(Wai)环(Huan)境(Jing)转(Zhuan)移(Yi)，(?)即(Ji)通(Tong)过(Guo)食(Shi)物(Wu)链(Lian)进(Jin)入(Ru)家(Jia)畜(Xu)和(He)人(Ren)体(Ti)等(Deng)。(?)施(Shi)入(Ru)土(Tu)壤(Rang)中(Zhong)过(Guo)剩(Sheng)的(De)氮(Dan)肥(Fei)，(?)在(Zai)土(Tu)壤(Rang)的(De)氧(Yang)化(Hua)还(Huan)原(Yuan)反(Fan)应(Ying)中(Zhong)分(Fen)别(Bie)形(Xing)成(Cheng)NO、(?) N2和(He)NH4、(?)NO2。(?)前(Qian)两(Liang)者(Zhe)易(Yi)于(Yu)淋(Lin)溶(Rong)而(?)污(Wu)染(Ran)地(Di)下(Xia)水(Shui)，(?)后(Hou)两(Liang)者(Zhe)易(Yi)于(Yu)挥(Hui)发(Fa)而(?)造(Zao)成(Cheng)氮(Dan)素(Su)损(Sun)失(Shi)并(Bing)污(Wu)染(Ran)大(Da)气(Qi)。(?)

土(Tu)壤(Rang)污(Wu)染(Ran)特(Te)点(Dian)

土(Tu)壤(Rang)污(Wu)染(Ran)具(Ju)有(You)隐(Yin)蔽(Bi)性(Xing)和(He)滞(Zhi)后(Hou)性(Xing)。(?)大(Da)气(Qi)污(Wu)染(Ran)、(?)水(Shui)污(Wu)染(Ran)和(He)废(Fei)弃(Qi)物(Wu)污(Wu)染(Ran)等(Deng)问(Wen)题(Ti)一(Yi)般(Ban)都(Du)比(Bi)较(Jiao)直(Zhi)观(Guan)，(?)通(Tong)过(Guo)感(Gan)官(Guan)就(Jiu)能(Neng)发(Fa)现(Xian)。(?)而(?)土(Tu)壤(Rang)污(Wu)染(Ran)则(Ze)不(Bu)同(Tong)，(?)它(Ta)往(Wang)往(Wang)要(Yao)通(Tong)过(Guo)对(Dui)土(Tu)壤(Rang)样(Yang)品(Pin)进(Jin)行(Xing)分(Fen)析(Xi)化(Hua)验(Yan)和(He)农(Nong)作(Zuo)物(Wu)的(De)残(Can)留(Liu)检(Jian)测(Ce)，(?)甚(Shen)至(Zhi)通(Tong)过(Guo)研(Yan)究(Jiu)对(Dui)人(Ren)畜(Xu)健(Jian)康(Kang)状(Zhuang)况(Kuang)的(De)影(Ying)响(Xiang)才(Cai)能(Neng)确(Que)定(Ding)。(?)因(Yin)此(Ci)，(?)土(Tu)壤(Rang)污(Wu)染(Ran)从(Cong)产(Chan)生(Sheng)污(Wu)染(Ran)到(Dao)出(Chu)现(Xian)问(Wen)题(Ti)通(Tong)常(Chang)会(Hui)滞(Zhi)后(Hou)较(Jiao)长(Chang)的(De)时(Shi)间(Jian)。(?)如(Ru)日(Ri)本(Ben)的(De)“(?)痛(Tong)痛(Tong)病(Bing)”(?)经(Jing)过(Guo)了(Liao)10～(?)20年(Nian)之(Zhi)后(Hou)才(Cai)被(Bei)人(Ren)们(Men)所(Suo)认(Ren)识(Shi)。(?)[1]

1.累(Lei)积(Ji)性(Xing)

污(Wu)染(Ran)物(Wu)质(Zhi)在(Zai)大(Da)气(Qi)和(He)水(Shui)体(Ti)中(Zhong)，(?)一(Yi)般(Ban)都(Du)比(Bi)在(Zai)土(Tu)壤(Rang)中(Zhong)更(Geng)容(Rong)易(Yi)迁(Qian)移(Yi)。(?)这(Zhe)使(Shi)得(De)污(Wu)染(Ran)物(Wu)质(Zhi)在(Zai)土(Tu)壤(Rang)中(Zhong)并(Bing)不(Bu)象(Xiang)在(Zai)大(Da)气(Qi)和(He)水(Shui)体(Ti)中(Zhong)那(Na)样(Yang)容(Rong)易(Yi)扩(Kuo)散(San)和(He)稀(Xi)释(Shi)，(?)因(Yin)此(Ci)容(Rong)易(Yi)在(Zai)土(Tu)壤(Rang)中(Zhong)不(Bu)断(Duan)积(Ji)累(Lei)而(?)超(Chao)标(Biao)，(?)同(Tong)时(Shi)也(Ye)使(Shi)土(Tu)壤(Rang)污(Wu)染(Ran)具(Ju)有(You)很(Hen)强(Qiang)的(De)地(Di)域(Yu)性(Xing)。(?)

2.不(Bu)可(Ke)逆(Ni)转(Zhuan)性(Xing)

重(Zhong)金(Jin)属(Shu)对(Dui)土(Tu)壤(Rang)的(De)污(Wu)染(Ran)基(Ji)本(Ben)上(Shang)是(Shi)一(Yi)个(Ge)不(Bu)可(Ke)逆(Ni)转(Zhuan)的(De)过(Guo)程(Cheng)，(?)许(Xu)多(Duo)有(You)机(Ji)化(Hua)学(Xue)物(Wu)质(Zhi)的(De)污(Wu)染(Ran)也(Ye)需(Xu)要(Yao)较(Jiao)长(Chang)的(De)时(Shi)间(Jian)才(Cai)能(Neng)降(Jiang)解(Jie)。(?)譬(Pi)如(Ru)：(?)被(Bei)某(Mou)些(Xie)重(Zhong)金(Jin)属(Shu)污(Wu)染(Ran)的(De)土(Tu)壤(Rang)可(Ke)能(Neng)要(Yao)100～(?)200年(Nian)时(Shi)间(Jian)才(Cai)能(Neng)够(Gou)恢(Hui)复(Fu)。(?)

3.难(Nan)治(Zhi)理(Li)

如(Ru)果(Guo)大(Da)气(Qi)和(He)水(Shui)体(Ti)受(Shou)到(Dao)污(Wu)染(Ran)，(?)切(Qie)断(Duan)污(Wu)染(Ran)源(Yuan)之(Zhi)后(Hou)通(Tong)过(Guo)稀(Xi)释(Shi)作(Zuo)用(Yong)和(He)自(Zi)净(Jing)化(Hua)作(Zuo)用(Yong)也(Ye)有(You)可(Ke)能(Neng)使(Shi)污(Wu)染(Ran)问(Wen)题(Ti)不(Bu)断(Duan)逆(Ni)转(Zhuan)，(?)但(Dan)是(Shi)积(Ji)累(Lei)在(Zai)污(Wu)染(Ran)土(Tu)壤(Rang)中(Zhong)的(De)难(Nan)降(Jiang)解(Jie)污(Wu)染(Ran)物(Wu)则(Ze)很(Hen)难(Nan)靠(Kao)稀(Xi)释(Shi)作(Zuo)用(Yong)和(He)自(Zi)净(Jing)化(Hua)作(Zuo)用(Yong)来(Lai)消(Xiao)除(Chu)。(?)

土(Tu)壤(Rang)污(Wu)染(Ran)一(Yi)旦(Dan)发(Fa)生(Sheng)，(?)仅(Jin)仅(Jin)依(Yi)靠(Kao)切(Qie)断(Duan)污(Wu)染(Ran)源(Yuan)的(De)方(Fang)法(Fa)则(Ze)往(Wang)往(Wang)很(Hen)难(Nan)恢(Hui)复(Fu)，(?)有(You)时(Shi)要(Yao)靠(Kao)换(Huan)土(Tu)、(?)淋(Lin)洗(Xi)土(Tu)壤(Rang)等(Deng)方(Fang)法(Fa)才(Cai)能(Neng)解(Jie)决(Jue)问(Wen)题(Ti)，(?)其(Qi)他(Ta)治(Zhi)理(Li)技(Ji)术(Shu)可(Ke)能(Neng)见(Jian)效(Xiao)较(Jiao)慢(Man)。(?)因(Yin)此(Ci)，(?)治(Zhi)理(Li)污(Wu)染(Ran)土(Tu)壤(Rang)通(Tong)常(Chang)成(Cheng)本(Ben)较(Jiao)高(Gao)、(?)治(Zhi)理(Li)周(Zhou)期(Qi)较(Jiao)长(Chang)。(?) 鉴(Jian)于(Yu)土(Tu)壤(Rang)污(Wu)染(Ran)难(Nan)于(Yu)治(Zhi)理(Li)，(?)而(?)土(Tu)壤(Rang)污(Wu)染(Ran)问(Wen)题(Ti)的(De)产(Chan)生(Sheng)又(You)具(Ju)有(You)明(Ming)显(Xian)的(De)隐(Yin)蔽(Bi)性(Xing)和(He)滞(Zhi)后(Hou)性(Xing)等(Deng)特(Te)点(Dian)，(?)因(Yin)此(Ci)土(Tu)壤(Rang)污(Wu)染(Ran)问(Wen)题(Ti)一(Yi)般(Ban)都(Du)不(Bu)太(Tai)容(Rong)易(Yi)受(Shou)到(Dao)重(Zhong)视(Shi)。(?)

4.高(Gao)辐(Fu)射(She)

大(Da)量(Liang)的(De)辐(Fu)射(She)污(Wu)染(Ran)了(Liao)土(Tu)地(Di)，(?)使(Shi)被(Bei)污(Wu)染(Ran)的(De)土(Tu)地(Di)含(Han)有(You)了(Liao)一(Yi)种(Zhong)毒(Du)质(Zhi)。(?)这(Zhe)种(Zhong)毒(Du)质(Zhi)会(Hui)使(Shi)植(Zhi)物(Wu)生(Sheng)长(Chang)不(Bu)了(Liao)，(?)停(Ting)止(Zhi)生(Sheng)长(Chang)！(?)

焚(Fen)烧(Shao)树(Shu)叶(Ye):树(Shu)叶(Ye)里(Li)含(Han)有(You)一(Yi)种(Zhong)有(You)毒(Du)物(Wu)质(Zhi)，(?)在(Zai)一(Yi)般(Ban)情(Qing)况(Kuang)下(Xia)是(Shi)不(Bu)会(Hui)散(San)发(Fa)出(Chu)来(Lai)的(De)。(?)但(Dan)一(Yi)遇(Yu)火(Huo)，(?)就(Jiu)会(Hui)蒸(Zheng)发(Fa)毒(Du)物(Wu)。(?)人(Ren)一(Yi)呼(Hu)吸(Xi)，(?)就(Jiu)会(Hui)中(Zhong)毒(Du)。(?)

现(Xian)行(Xing)标(Biao)准(Zhun)《(?)土(Tu)壤(Rang)环(Huan)境(Jing)质(Zhi)量(Liang) 农(Nong)用(Yong)地(Di)土(Tu)壤(Rang)污(Wu)染(Ran)风(Feng)险(Xian)管(Guan)控(Kong)标(Biao)准(Zhun)（(?)试(Shi)行(Xing)）(?)》(?)（(?)GB 15618-2018）(?) 中(Zhong)农(Nong)用(Yong)地(Di)土(Tu)壤(Rang)污(Wu)染(Ran)风(Feng)险(Xian)筛(Shai)选(Xuan)值(Zhi)的(De)基(Ji)本(Ben)项(Xiang)目(Mu)为(Wei)必(Bi)测(Ce)项(Xiang)目(Mu),包(Bao)括(Kuo)镉(Ge)、(?)汞(Gong)、(?)砷(Shen)、(?)铅(Qian)、(?)铬(Ge)、(?)铜(Tong)、(?)镍(Nie)、(?)锌(Xin)。(?)

相(Xiang)关(Guan)标(Biao)准(Zhun)：(?)

《(?)土(Tu)壤(Rang)环(Huan)境(Jing)质(Zhi)量(Liang)标(Biao)准(Zhun)》(?) GB 15618-1995

《(?)土(Tu)壤(Rang)环(Huan)境(Jing)监(Jian)测(Ce)技(Ji)术(Shu)规(Gui)范(Fan)》(?)HJ/T 166-2004

《(?)工(Gong)业(Ye)企(Qi)业(Ye)土(Tu)壤(Rang)环(Huan)境(Jing)质(Zhi)量(Liang)风(Feng)险(Xian)评(Ping)价(Jia)基(Ji)准(Zhun)》(?)HJ/T 25-1999

《(?)展(Zhan)览(Lan)会(Hui)用(Yong)地(Di)土(Tu)壤(Rang)环(Huan)境(Jing)质(Zhi)量(Liang)评(Ping)价(Jia)标(Biao)准(Zhun)（(?)暂(Zan)行(Xing)）(?)》(?)HJ 350-2007

《(?)污(Wu)染(Ran)场(Chang)地(Di)环(Huan)境(Jing)监(Jian)测(Ce)技(Ji)术(Shu)导(Dao)则(Ze)》(?)

其(Qi)他(Ta)项(Xiang)目(Mu)由(You)地(Di)方(Fang)环(Huan)境(Jing)保(Bao)护(Hu)主(Zhu)管(Guan)部(Bu)门(Men)根(Gen)据(Ju)本(Ben)地(Di)区(Qu)土(Tu)壤(Rang)污(Wu)染(Ran)特(Te)点(Dian)和(He)环(Huan)境(Jing)管(Guan)理(Li)需(Xu)求(Qiu)进(Jin)行(Xing)选(Xuan)择(Ze)。(?)

6.农(Nong)用(Yong)地(Di)土(Tu)壤(Rang)污(Wu)染(Ran)风(Feng)险(Xian)筛(Shai)选(Xuan)值(Zhi)和(He)管(Guan)制(Zhi)值(Zhi)的(De)使(Shi)用(Yong)

6.1 当(Dang)土(Tu)壤(Rang)中(Zhong)污(Wu)染(Ran)物(Wu)含(Han)量(Liang)等(Deng)于(Yu)或(Huo)者(Zhe)低(Di)于(Yu)表(Biao) 1 和(He)表(Biao) 2 规(Gui)定(Ding)的(De)风(Feng)险(Xian)筛(Shai)选(Xuan)值(Zhi)时(Shi),农(Nong)用(Yong)地(Di)土(Tu)壤(Rang)污(Wu)染(Ran)风(Feng)险(Xian)低(Di), 一(Yi)般(Ban)情(Qing)况(Kuang)下(Xia)可(Ke)以(Yi)忽(Hu)略(Lue);高(Gao)于(Yu)表(Biao) 1 和(He)表(Biao) 2 规(Gui)定(Ding)的(De)风(Feng)险(Xian)筛(Shai)选(Xuan)值(Zhi)时(Shi),可(Ke)能(Neng)存(Cun)在(Zai)农(Nong)用(Yong)地(Di)土(Tu)壤(Rang)污(Wu)染(Ran)风(Feng)险(Xian),应(Ying)加(Jia)强(Qiang)土(Tu)壤(Rang)环(Huan)境(Jing)监(Jian)测(Ce)和(He)农(Nong)产(Chan)品(Pin)协(Xie)同(Tong)监(Jian)测(Ce)。(?)

6.2 当(Dang)土(Tu)壤(Rang)中(Zhong)镉(Ge)、(?)汞(Gong)、(?)砷(Shen)、(?)铅(Qian)、(?)铬(Ge)的(De)含(Han)量(Liang)高(Gao)于(Yu)表(Biao) 1 规(Gui)定(Ding)的(De)风(Feng)险(Xian)筛(Shai)选(Xuan)值(Zhi)、(?)等(Deng)于(Yu)或(Huo)者(Zhe)低(Di)于(Yu)表(Biao) 3 规(Gui)定(Ding)的(De)风(Feng) 险(Xian)管(Guan)制(Zhi)值(Zhi)时(Shi),可(Ke)能(Neng)存(Cun)在(Zai)食(Shi)用(Yong)农(Nong)产(Chan)品(Pin)不(Bu)符(Fu)合(He)质(Zhi)量(Liang)安(An)全(Quan)标(Biao)准(Zhun)等(Deng)土(Tu)壤(Rang)污(Wu)染(Ran)风(Feng)险(Xian),原(Yuan)则(Ze)上(Shang)应(Ying)当(Dang)采(Cai)取(Qu)农(Nong)艺(Yi)调(Diao)控(Kong)、(?)替(Ti)代(Dai)种(Zhong)植(Zhi)等(Deng)安(An)全(Quan)利(Li)用(Yong)措(Cuo)施(Shi)。(?)

6.3 当(Dang)土(Tu)壤(Rang)中(Zhong)镉(Ge)、(?)汞(Gong)、(?)砷(Shen)、(?)铅(Qian)、(?)铬(Ge)的(De)含(Han)量(Liang)高(Gao)于(Yu)表(Biao) 3 规(Gui)定(Ding)的(De)风(Feng)险(Xian)管(Guan)制(Zhi)值(Zhi)时(Shi),食(Shi)用(Yong)农(Nong)产(Chan)品(Pin)不(Bu)符(Fu)合(He)质(Zhi)量(Liang)安(An) 全(Quan)标(Biao)准(Zhun)等(Deng)农(Nong)用(Yong)地(Di)土(Tu)壤(Rang)污(Wu)染(Ran)风(Feng)险(Xian)高(Gao),且(Qie)难(Nan)以(Yi)通(Tong)过(Guo)安(An)全(Quan)利(Li)用(Yong)措(Cuo)施(Shi)降(Jiang)低(Di)食(Shi)用(Yong)农(Nong)产(Chan)品(Pin)不(Bu)符(Fu)合(He)质(Zhi)量(Liang)安(An)全(Quan)标(Biao)准(Zhun)等(Deng)农(Nong)用(Yong)地(Di)土(Tu)壤(Rang)污(Wu)染(Ran)风(Feng)险(Xian),原(Yuan)则(Ze)上(Shang)应(Ying)当(Dang)采(Cai)取(Qu)禁(Jin)止(Zhi)种(Zhong)植(Zhi)食(Shi)用(Yong)农(Nong)产(Chan)品(Pin)、(?)退(Tui)耕(Geng)还(Huan)林(Lin)等(Deng)严(Yan)格(Ge)管(Guan)控(Kong)措(Cuo)施(Shi)。(?)

6.4 土(Tu)壤(Rang)环(Huan)境(Jing)质(Zhi)量(Liang)类(Lei)别(Bie)划(Hua)分(Fen)应(Ying)以(Yi)本(Ben)标(Biao)准(Zhun)为(Wei)基(Ji)础(Chu),结(Jie)合(He)食(Shi)用(Yong)农(Nong)产(Chan)品(Pin)协(Xie)同(Tong)监(Jian)测(Ce)结(Jie)果(Guo),依(Yi)据(Ju)相(Xiang)关(Guan)技(Ji)术(Shu)规(Gui)定(Ding) 进(Jin)行(Xing)划(Hua)定(Ding)。(?)