藥肥混(hun)用要點
根據水(shui)溶液的(de)酸(suan)堿(jian)(jian)度,農(nong)(nong)(nong)(nong)藥(yao)可分為中性(xing)、酸(suan)性(xing)、堿(jian)(jian)性(xing)農(nong)(nong)(nong)(nong)藥(yao)。堿(jian)(jian)性(xing)農(nong)(nong)(nong)(nong)藥(yao)包括石硫合(he)劑、波爾多液、松脂合(he)劑、石灰等;酸(suan)性(xing)農(nong)(nong)(nong)(nong)藥(yao)包括硫酸(suan)銅、硫酸(suan)鋇、硫酸(suan)鋅(xin)、馬拉硫磷等;中性(xing)農(nong)(nong)(nong)(nong)藥(yao)較多,大多數化學合(he)成農(nong)(nong)(nong)(nong)藥(yao)、植物性(xing)農(nong)(nong)(nong)(nong)藥(yao)、微生物農(nong)(nong)(nong)(nong)藥(yao)等都是中性(xing)農(nong)(nong)(nong)(nong)藥(yao)。
一(yi)般來(lai)說,堿(jian)性(xing)(xing)農(nong)藥(yao)(yao)應單獨(du)使用(yong),但有時也可(ke)與(yu)其他堿(jian)性(xing)(xing)物質混用(yong),如(ru)(ru)(ru):敵(di)百蟲與(yu)肥皂混用(yong),藥(yao)(yao)效可(ke)以(yi)提(ti)(ti)高。酸性(xing)(xing)農(nong)藥(yao)(yao)之(zhi)(zhi)間,中(zhong)性(xing)(xing)農(nong)藥(yao)(yao)之(zhi)(zhi)間,中(zhong)性(xing)(xing)農(nong)藥(yao)(yao)與(yu)酸性(xing)(xing)農(nong)藥(yao)(yao)之(zhi)(zhi)間多(duo)可(ke)混用(yong),但也不(bu)是都(dou)可(ke)以(yi)混用(yong)。混用(yong)時應以(yi)不(bu)提(ti)(ti)高農(nong)藥(yao)(yao)對人畜毒性(xing)(xing)為(wei)原則。部分農(nong)藥(yao)(yao)如(ru)(ru)(ru)甲基托布津(甲基硫(liu)菌靈)不(bu)能與(yu)銅制(zhi)劑,如(ru)(ru)(ru)硫(liu)酸銅、波爾(er)多(duo)液、可(ke)殺得、科博甲霜銅、綠得保、綠乳(ru)銅、病毒A、病毒克星、醋酸銅及其制(zhi)劑等混用(yong)。
化(hua)肥按其水溶液的酸堿(jian)度,可分為堿(jian)性、酸性、中性三類。堿(jian)性肥料(liao)包括氨水、碳銨(an)(an)、鈣(gai)鎂磷(lin)等。酸性肥料(liao)包括硫(liu)酸銨(an)(an)、氯(lv)化(hua)銨(an)(an)、硝酸銨(an)(an)、普(pu)鈣(gai)、磷(lin)酸二氫鉀(jia)(jia)等;中性肥料(liao)主要有尿素、硫(liu)酸鉀(jia)(jia)、氯(lv)化(hua)鉀(jia)(jia)、硝酸鉀(jia)(jia)等。
堿(jian)性肥料應單獨使用(yong),但(dan)有時也(ye)可(ke)以與某些化(hua)肥隨(sui)混(hun)隨(sui)用(yong),如碳銨與硫酸銨混(hun)合施用(yong),但(dan)不能久放;酸性農(nong)藥、化(hua)肥均可(ke)與中性肥料混(hun)用(yong);中性農(nong)藥、化(hua)肥也(ye)可(ke)以混(hun)用(yong)。
含氯化(hua)(hua)肥(fei)不能用于忌氯作物上(shang),如煙草、茶葉等,否則(ze)會對作物造成(cheng)傷害或影響產(chan)品(pin)品(pin)質。氯化(hua)(hua)鉀、氯化(hua)(hua)銨及其(qi)復合混劑就(jiu)是(shi)含氯化(hua)(hua)肥(fei),購用時應(ying)特(te)別注意。鑒于農藥(yao)化(hua)(hua)肥(fei)品(pin)種極(ji)多,這里不能一一列舉,建議農民朋友混用時應(ying)向當地(di)農業技術部門咨詢,以(yi)免出現(xian)失誤。
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