紫云縣境(jing)(jing)內(nei)有優(you)質(zhi)紅(hong)(hong)薯生長的(de)自然環境(jing)(jing)。縣內(nei)河流密布,土(tu)(tu)(tu)(tu)層(ceng)深厚,土(tu)(tu)(tu)(tu)壤(rang)(rang)(rang)(rang)(rang)類型(xing)多(duo)(duo)(duo)砂質(zhi)型(xing)的(de)紅(hong)(hong)壤(rang)(rang)(rang)(rang)(rang)土(tu)(tu)(tu)(tu)與(yu)黃壤(rang)(rang)(rang)(rang)(rang)土(tu)(tu)(tu)(tu),富含(han)磷(lin)、鉀(jia)、硅、鐵(tie)等微(wei)(wei)量(liang)元(yuan)素。土(tu)(tu)(tu)(tu)壤(rang)(rang)(rang)(rang)(rang)PH值(zhi)多(duo)(duo)(duo)在5.0-7.0之間,這(zhe)(zhe)(zhe)正是優(you)質(zhi)紅(hong)(hong)芯薯生長需要的(de)土(tu)(tu)(tu)(tu)壤(rang)(rang)(rang)(rang)(rang)環境(jing)(jing)。全境(jing)(jing)廣泛分(fen)布頁(ye)(ye)巖(yan),這(zhe)(zhe)(zhe)種頁(ye)(ye)巖(yan)易于風(feng)(feng)化(hua),尤其(qi)是泥(ni)質(zhi)頁(ye)(ye)巖(yan),群(qun)眾稱為“風(feng)(feng)化(hua)巖(yan)”,物(wu)理分(fen)化(hua)迅速(su),風(feng)(feng)化(hua)物(wu)富含(han)磷(lin)、鉀(jia)、硅、鐵(tie)。特別是鉀(jia),其(qi)他微(wei)(wei)量(liang)元(yuan)素含(han)量(liang)也高,因而礦物(wu)質(zhi)養(yang)分(fen)較(jiao)為齊全。自然肥(fei)(fei)力較(jiao)高,土(tu)(tu)(tu)(tu)層(ceng)中多(duo)(duo)(duo)含(han)半風(feng)(feng)化(hua)母巖(yan)碎(sui)屑,土(tu)(tu)(tu)(tu)質(zhi)泡松(song),通(tong)(tong)氣(qi)透水,供肥(fei)(fei)性(xing)能良好,微(wei)(wei)酸至(zhi)酸性(xing)反應。這(zhe)(zhe)(zhe)種土(tu)(tu)(tu)(tu)壤(rang)(rang)(rang)(rang)(rang)適宜紅(hong)(hong)薯的(de)生長,故歷來有“紅(hong)(hong)薯半年糧"的(de)俗稱。砂巖(yan)及母質(zhi)風(feng)(feng)化(hua)物(wu)中質(zhi)地(di)較(jiao)細,養(yang)分(fen)含(han)量(liang)較(jiao)高的(de)顆(ke)粒(li)多(duo)(duo)(duo)被(bei)搬(ban)運(yun)堆積在坡(po)臺地(di),形成的(de)耕地(di)土(tu)(tu)(tu)(tu)壤(rang)(rang)(rang)(rang)(rang)以黃壤(rang)(rang)(rang)(rang)(rang)黃棕(zong)壤(rang)(rang)(rang)(rang)(rang)為主(zhu)。這(zhe)(zhe)(zhe)類土(tu)(tu)(tu)(tu)壤(rang)(rang)(rang)(rang)(rang)質(zhi)地(di)適中,疏(shu)松(song)通(tong)(tong)氣(qi)。水、肥(fei)(fei)、氣(qi)、熱協調(diao)。有機質(zhi)及磷(lin)、鉀(jia)含(han)量(liang)豐(feng)富。養(yang)分(fen)轉(zhuan)化(hua)迅速(su),土(tu)(tu)(tu)(tu)壤(rang)(rang)(rang)(rang)(rang)供肥(fei)(fei)性(xing)好。
紫(zi)云縣境(jing)內(nei)(nei)境(jing)內(nei)(nei)著(zhu)名的(de)(de)(de)(de)“北(bei)盤江低(di)(di)熱(re)河谷(gu)(gu)氣候”提供紅(hong)(hong)薯(shu)生(sheng)(sheng)長(chang)(chang)和紅(hong)(hong)薯(shu)粉絲(si)加(jia)工的(de)(de)(de)(de)氣候環境(jing),降(jiang)水(shui)(shui)充沛,有利(li)于(yu)(yu)紅(hong)(hong)薯(shu)快(kuai)速(su)生(sheng)(sheng)長(chang)(chang),植物生(sheng)(sheng)長(chang)(chang)積溫(wen)(wen)(wen)(wen)(wen)(wen)高(gao),方便于(yu)(yu)優(you)質紅(hong)(hong)芯薯(shu)生(sheng)(sheng)長(chang)(chang)。紫(zi)云縣地(di)處(chu)黔中(zhong)腹地(di)丘陵過渡的(de)(de)(de)(de)斜坡地(di)帶,縣境(jing)內(nei)(nei)多(duo)河谷(gu)(gu)平(ping)壩和山問谷(gu)(gu)地(di),常(chang)成為冷(leng)暖氣團回旋儲(chu)積之(zhi)地(di),故形(xing)成特有的(de)(de)(de)(de)貴州(zhou)高(gao)原“壩子(zi)氣候”,該氣候有以(yi)下特點:首先(xian)是冬(dong)(dong)夏(xia)季(ji)節(jie)長(chang)(chang),溫(wen)(wen)(wen)(wen)(wen)(wen)差(cha)大(da),冬(dong)(dong)季(ji)溫(wen)(wen)(wen)(wen)(wen)(wen)涼,夏(xia)季(ji)炎熱(re)。冬(dong)(dong)季(ji)從(cong)(cong)小雪至驚蟄,約l00天(tian)(tian)(tian),最(zui)(zui)冷(leng)月(1月)平(ping)均氣溫(wen)(wen)(wen)(wen)(wen)(wen)3—5℃。夏(xia)季(ji)從(cong)(cong)立(li)夏(xia)至秋分,約145天(tian)(tian)(tian),是四季(ji)中(zhong)最(zui)(zui)長(chang)(chang)的(de)(de)(de)(de)一(yi)(yi)季(ji),最(zui)(zui)熱(re)月(7月)平(ping)均氣溫(wen)(wen)(wen)(wen)(wen)(wen)27—28℃。其次是云霧多(duo),日(ri)照少(shao),日(ri)照率低(di)(di),但較集中(zhong)。最(zui)(zui)后是雨(yu)(yu)日(ri)多(duo),雨(yu)(yu)量大(da),降(jiang)水(shui)(shui)集中(zhong),濕熱(re)同季(ji)。連續降(jiang)雨(yu)(yu)日(ri)數(shu)一(yi)(yi)般3—5天(tian)(tian)(tian)。春夏(xia)之(zhi)交可達26天(tian)(tian)(tian)之(zhi)久,年均降(jiang)水(shui)(shui)量一(yi)(yi)般1300毫(hao)米左(zuo)右。結合紅(hong)(hong)薯(shu)生(sheng)(sheng)長(chang)(chang)的(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)條(tiao)件分析:塊根萌(meng)(meng)芽(ya)與溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)的(de)(de)(de)(de)關系,萌(meng)(meng)芽(ya)最(zui)(zui)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)16~18℃,適(shi)宜(yi)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)28~32℃,超過35℃萌(meng)(meng)芽(ya)受(shou)抑制(zhi)。蔓葉生(sheng)(sheng)長(chang)(chang)與溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)的(de)(de)(de)(de)關系,最(zui)(zui)適(shi)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)21~26℃,低(di)(di)于(yu)(yu)15℃生(sheng)(sheng)長(chang)(chang)停止,高(gao)于(yu)(yu)38℃生(sheng)(sheng)長(chang)(chang)受(shou)抑制(zhi)。根生(sheng)(sheng)長(chang)(chang)與溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)的(de)(de)(de)(de)關系,不定根的(de)(de)(de)(de)發(fa)生(sheng)(sheng)要求(qiu)地(di)溫(wen)(wen)(wen)(wen)(wen)(wen)15℃以(yi)上(shang),在15~30℃的(de)(de)(de)(de)范(fan)圍內(nei)(nei),溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)越高(gao)發(fa)根越快(kuai)。塊根形(xing)成的(de)(de)(de)(de)適(shi)宜(yi)地(di)溫(wen)(wen)(wen)(wen)(wen)(wen)21~29℃,低(di)(di)于(yu)(yu)20℃或高(gao)于(yu)(yu)32℃均不利(li)塊根形(xing)成;塊根膨大(da)的(de)(de)(de)(de)適(shi)宜(yi)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)為22~23℃,膨大(da)的(de)(de)(de)(de)最(zui)(zui)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)為16~18℃。良(liang)(liang)好的(de)(de)(de)(de)氣候條(tiao)件形(xing)成了紅(hong)(hong)芯紅(hong)(hong)薯(shu)的(de)(de)(de)(de)優(you)良(liang)(liang)品(pin)質。
紫(zi)云縣所轄五峰街(jie)道、松山街(jie)道、貓營鎮(zhen)(zhen)、板(ban)當(dang)鎮(zhen)(zhen)、壩(ba)羊鎮(zhen)(zhen)、格(ge)凸河鎮(zhen)(zhen)、四大寨鄉、宗地(di)鎮(zhen)(zhen)、猴場鎮(zhen)(zhen)、大營鎮(zhen)(zhen)、白(bai)石巖(yan)鄉共2個(ge)街(jie)道、7個(ge)鎮(zhen)(zhen)、2個(ge)鄉、147個(ge)行政村(cun)(cun)(cun)。保護范圍東至板(ban)當(dang)鎮(zhen)(zhen)尅混村(cun)(cun)(cun),南至大營鎮(zhen)(zhen)打哇坪村(cun)(cun)(cun),西至白(bai)石巖(yan)鄉新馳村(cun)(cun)(cun),北(bei)至貓營鎮(zhen)(zhen)黃土村(cun)(cun)(cun)。地(di)理(li)坐標:東經105°55′~106°29′,北(bei)緯25°21′~26°03′。保護規模:面積(ji)2000公頃(qing),產量2.4萬噸,產值14400萬元。
外在感官特征:呈長(chang)紡錘形,單個重50~200g,表(biao)皮光滑、呈淡(dan)黃色(se),肉(rou)質淡(dan)粉色(se),色(se)澤鮮(xian)亮;鮮(xian)食質脆(cui)味(wei)甜(tian)(tian),蒸熟(shu)后通(tong)體晶瑩,薯肉(rou)淡(dan)黃色(se),細膩綿軟(ruan),甘(gan)甜(tian)(tian)具板(ban)栗(li)香味(wei)。
內在品質:淀粉(fen)≥19.0%、粗纖(xian)維≤1.5%、還原糖(tang)(以葡(pu)萄(tao)糖(tang)計)≥1.0%。
安(an)全(quan)(quan)要求:紫(zi)云紅(hong)芯(xin)紅(hong)薯(shu)質(zhi)量安(an)全(quan)(quan)須符合(he)《中華人(ren)民(min)共和國農產(chan)品質(zhi)量安(an)全(quan)(quan)法(fa)》等相關(guan)法(fa)律法(fa)規要求,以及符合(he)國家(jia)有關(guan)強(qiang)制性(xing)技術規范要求。