Cov tshuaj tua kab tsuag drift ua rau kev puas tsuaj rau cov qoob loo uas tsis yog lub hom phiaj yog ib qho tseem ceeb ntawm cov tshuaj tua kab Phytotoxicity. Muaj ntau cov lus ceeb toom ntawm kev hais plaub ntug vim yog tshuaj tua kab puas tsuaj los ntawm kev siv tshuaj tua kab. Ib qho xwm txheej yog tias ob lub tuam txhab German agrochemical loj tau raug xaj kom them nyiaj $ 265 lab (ib ncig RMB 1.85 billion) vim tias lawv tsim cov tshuaj tua kab mob Dicamba drift puas txiv duaj ntoo uas muaj los ntawm Asmeskas cov neeg ua liaj ua teb. Nws tau tshaj tawm tias qhov no yog thawj qhov kev foob cuam tshuam nrog cov tshuaj tua kab mob dicamba uas tau hnov los ntawm lub tsev hais plaub.
Cov tshuaj tua kab mob ua rau muaj kev puas tsuaj feem ntau muaj qhov hnyav me me, xws li 2,4-D, MCPA, dicamba, thiab lwm yam. Peb feem ntau pom cov lus ceeb toom txog kev pheej hmoo ntawm cov khoom piav qhia ntawm 2,4-D ntsig txog cov khoom hauv kev ua lag luam, hais tias: "Ua tib zoo saib xyuas cov cua kev taw qhia thaum lub sij hawm thov kom tsis txhob muaj cov dej ntws mus rau cov qoob loo uas nyob ib sab thiab zam cov tshuaj tua kab phytotoxicity." Cov khoom uas muaj 2,4-D ntawm lub khw feem ntau suav nrog 2,4-D isooctyl ester EC, 2,4-D dimethylammonium ntsev SL, thiab 2,4-D butyl ester EC. Puas muaj qhov sib txawv ntawm qhov ua tau zoo ntawm cov khoom siv los tiv thaiv kev sib txawv ntawm cov qauv sib txawv thiab hom 2,4-D khoom? Qhov no xav kom peb ua kev tshawb fawb los txiav txim siab.
Pic 1. Txau tshuaj tua kab los ntawm kev siv drone thiab boom sprayer loj
Cov txheej txheem ib txwm siv rau kev kuaj tshuaj tua kab drift ntim nrog rau kev siv cov ntawv lim lossis polytetrafluoroethylene hlua los teeb tsa cov ntsiab lus sib txawv ntawm qhov sib txawv los sau cov tshuaj tua kab drifted. Tom qab ntawd, cov dyeing nyob rau hauv cov tee dej yog eluted, thiab ib tug UV-pom spectrophotometer yog siv los ntsuas lub absorbance ntawm lub eluate los txiav txim tus nqi ntawm droplet deposition. Txawm li cas los xij, txoj kev no muaj ntau qhov tsis zoo, suav nrog kev ua haujlwm nyuaj, lub voj voog ua haujlwm ntev, kev cuam tshuam tib neeg ntau dhau, thiab muaj kev pheej hmoo siab.
Pic 2. Schematic Diagram of Traditional Drift Volume Test Method
Sinvochem tau tsim ib qho kev soj ntsuam drift los ntawm kev sib koom tes nrog cov tsev kawm ntawv qib siab hauv tsev, cov tsev tshawb fawb, thiab cov chaw tsim khoom. Ua ke nrog lub tshuab cua tshuab los simulate qhov sib txawv ntawm ib puag ncig thiab kev nyab xeeb, qhov kev sim ntsuas
Pic 3. Cua tunnel system los ntsuas cov ntim drift
tus naj npawb thiab ntim ntawm cov tee drifted los ntawm aqueous tov ntawm cov tshuaj tua kab sib txawv nyob rau hauv txawv cua qhia thiab ceev, tshuaj tsuag nozzle qauv, txau qhov siab, thiab kub thiab av noo tej yam kev mob. Nws ntsuas qhov sib txawv ntawm qhov sib txawv ntawm cov tshuaj tua kab sib txawv, kuaj qhov muaj peev xwm los tiv thaiv cov tshuaj tua kab thaum ntxiv nrog cov tshuaj tua kab mob hauv huab cua, thiab tshuaj ntsuam tawm cov txiaj ntsig zoo tank-mixed aerial spray adjuvants.
Qhov kev ntsuas lub tshuab xaim hluav taws xob siv cov txheej txheem laser tawg los ntsuas qhov ntim ntawm cov tee drift, uas muaj qhov zoo ntawm qhov ntsuas qhov tseeb thiab lub sijhawm tiag tiag, kev ua haujlwm yooj yim, thiab ntsuas ntsuas qhov loj me.
Peb tau sau ntau hom 2,4-D isooctyl ester EC thiab 2,4-D dimethylammonium ntsev SL formulations muaj nyob rau hauv khw thiab sim lawv drift ntim siv lub droplet drift xeem system. Peb tau xaiv cov qauv nozzle sib koom ua ke, nrog rau kev txau siab ntawm 0.3Mpa thiab crosswind ceev ntawm 1.5m / s, los ntsuas cov kab rov tav drift ntim ntawm cov kev kho mob tshaj li ntawm 2m. Cov tshuaj ntsuam xyuas tau teeb tsa raws li cov hauv qab no dilution folds, thiab cov txiaj ntsig kev xeem yog raws li hauv qab no:
Table 1. Drift Volume of 2,4-D Isooctyl Ester EC muaj nyob hauv khw
|
Yam khoom |
Khoom |
Kev kho mob |
Dilution quav |
Drift Volume (ul/s) |
No.of drift droplet (pcs / s) |
|
1 |
50% 2, 4-D Isooctyl Ester EC |
A |
200 |
42.4b |
324.42b |
|
2 |
50% 2, 4-D Isooctyl Ester EC |
B |
200 |
27.24c |
311.66 cd |
|
3 |
77% 2, 4-D Isooctyl Ester EC |
C |
300 |
27.38c |
301.6d |
|
4 |
77% 2, 4-D Isooctyl Ester EC |
D |
300 |
27.72c |
305.86d |
|
5 |
77% 2, 4-D Isooctyl Ester EC |
E |
300 |
91.19a |
339.6a |
Lub 2.4-D isooctyl ester EC formulations los ntawm kev ua lag luam nthuav qhia txawv qib ntawm kev tiv thaiv drift. Raws li pom nyob rau hauv Table 1, Kev Kho E's formulation muaj ib tug loj drift teeb meem, nrog ib tug drift ntim 2-3 lub sij hawm siab tshaj lwm yam khoom, thiab tus naj npawb ntawm drifted droplet kuj ntau dua. Ntawm lawv, kev kho B, C, thiab D muaj qhov ntim tsawg dua thiab muaj kev nyab xeeb dua.
Table 2.Drift Volume of 2,4-Ddimethylammonium SL muaj nyob rau hauv khw
|
Yam khoom |
Khoom |
Kev kho mob |
Dilution quav |
Drift Volume (ul/s) |
No.of drift droplet (pcs / s) |
|
1 |
60% 2, 4-Ddimethylammonium SL |
1 |
250 |
1085.5a |
286.24a |
|
2 |
720g/L 2, 4-Ddimethylammonium SL |
2 |
300 |
322.02c |
274.14a |
|
3 |
720g/L 2, 4-Ddimethylammonium SL |
3 |
300 |
725.38b |
284.66a |
|
4 |
720g/L 2, 4-Ddimethylammonium SL |
4 |
300 |
1109.34a |
267a |
Lub 2,4-D dimethylammonium ntsev SL ntawm kev ua lag luam kuj nthuav tawm ntau qib ntawm kev muaj peev xwm tiv thaiv drift, thiab muaj qhov sib txawv ntau dua nyob rau hauv drift ntim ntawm cov formulations sib txawv. Raws li tib yam kev sim, qhov ntim ntim ntawm 2,4-D dimethylammonium ntsev SL yog qhov siab dua li ntawm 2,4-D isooctyl ester EC. Raws li tuaj yeem pom los ntawm Table 2, qhov ntim drift ntawm 2,4-D dimethylammonium ntsev SL cov khoom lag luam los ntawm 1 thiab 4 yog qhov loj, tshaj 1000 microliters ib ob, thaum qhov siab tshaj plaws drift ntim ntawm 2,{{14} }D isooctyl ester EC tsis tshaj 100 microliters.
Nws tuaj yeem txiav txim siab tias cov tshuaj tsuag qhov ntau thiab tsawg sib txawv ntawm cov formulations sib txawv. Nyob rau hauv tib txoj kev txau, cov tshuaj tsuag qhov loj me ntawm emulsifiable concentrates feem ntau loj dua li cov tshuaj aqueous, uas ua rau muaj qhov me me drift ntim.
Anti-Drift Solution los ntawm Sinvochem:
Anti-drift adjuvant UNIFLY 001 yog ib qho khoom siv zoo uas tswj kev faib cov tee dej. Tom qab tshuaj tsuag los ntawm ntau lub nozzles, nws ua kom muaj kev sib faib ntawm cov tshuaj tsuag tsuag, tiv thaiv kom tsis txhob muaj dej ntws. Lub caij no, nws muaj cov khoom zoo los tiv thaiv evaporation nyob rau hauv high-temperature thiab qhuav ib puag ncig, xyuas kom meej cov tshuaj tua kab. Tsim nyog rau lub tank sib xyaw hauv cov xwm txheej saum toj saud, cov khoom siv no kuj tuaj yeem siv rau hauv ntau yam tshuaj tsuag tshuaj tua kab mob, cov tshuaj tua hluav taws xob, thiab lwm yam tshuaj tsuag. Nws lub hom phiaj tseem ceeb yog los daws cov teeb meem xws li evaporation ntau dhau ntawm cov tee dej thaum lub sij hawm hloov, cov tee drift nrog rau cov cua, thiab kev txhim kho cov tshuaj tua kab adhesion thiab wettability thaum lub sij hawm aerial lossis mechanical spraying ntawm high dilution concentrations. Thaum siv los ua ke nrog cov tshuaj tua kab rau kev siv dav hlau, qhov adjuvant no tuaj yeem txhim kho kev ruaj ntseg ntawm cov tshuaj tua kab diluted, tswj cov atomized droplet loj nyob rau hauv ib tug tsim nyog faib ntau yam, yog li txo drift, txhawb tee sedimentation, tiv thaiv evaporation, thiab txhim kho cov affinity. tshuaj tua kab rau qoob loo.
Peb lub tuam txhab yog nruab nrog droplet loj analyzers thiab tshuaj tsuag drift testers, uas muaj peev xwm ib txhij ntsuas lub droplet loj thiab drift ntim nyob rau hauv txawv spraying tej yam kev mob. Peb tuaj yeem muab cov neeg siv khoom ntsuas cov tshuaj tua kab drift, thiab sib koom ua ke tsim cov khoom