Cov kev txhawb siab tseem ceeb ntawm tsoomfwv tsom rau kev txo qis kev hloov pauv huab cua yuav luag yuav txhawb koj, thiab koj cov tswv tsev, txav mus rau qhov tsis muaj-txog thiab npog cov qoob loo. Qhov ntawd yog vim li cas rau peb cov dab neeg uas tau npaj los pab koj hloov mus rau kev ua liaj ua teb ntsug, qhov twg cov kev coj ua tau zoo tshaj plaws.
Raws li koj npaj cog koj thawj cov qoob loo hauv ib puag ncig ntsug, txawm tias nws yog ib thaj teb lossis tag nrho ua liaj ua teb, nco ntsoov 4Rs ntawm kev tswj cov chiv - cov khoom tsim nyog, tus nqi, sijhawm thiab qhov chaw - tej zaum yuav txawv ntawm kab rov tav, puv-dav. tillage systems.
Cov residue tuaj yeem cuam tshuam phosphorus uptake. Nto cover slows av warming. Yog li ntawd, cov av uas ntsuas txaus rau siab phosphorus tej zaum yuav tsis txaus thaum lub caij nplooj ntoos hlav.
"Cov pob kws yuav loj hlob thaum av kub txog 50˚F," hais tias Farm Journal field agronomist Ken Ferrie. "Tab sis Farm Journal cov kev tshawb fawb ntawm kev ua liaj ua teb qhia tias phosphorus yuav tsis muaj ntau heev kom txog thaum cov av kub nce mus txog 65˚F. Qhov ntawd yog thaum cov kab mob hauv av uas lub luag haujlwm tso tawm cov as-ham pib ua haujlwm. tshwm sim, pob ntseg girth yuav raug txo.
"Koj tuaj yeem tiv thaiv cov nroj tsuag hluas los ntawm kev kaw los ntawm kev siv phosphorus chiv nrog cov cog," Ferrie hais ntxiv. "Cov hauv paus hniav yuav pib loj hlob ntawm 50˚F. Thaum lawv ncav cuag lub pob pib, lawv yuav khaws cov phosphorus txawm tias cov av kub qis dua 65˚F.
"Yog hais tias cov av sim siab hauv phosphorus, thiab koj tos rau 50˚F av kub rau cog, koj yuav xav tau qis qis ntawm qhov pib hauv furrow. , tab sis nws yuav tsis txaus kom tau mus rau hauv caug-siab pob kws koj yuav xav tau tus nqi siab dua, muab tso rau ntawm kab.
Feem ntau npog cov qoob loo nce cov pa roj carbon nplua. Raws li cov neeg hauv av nce ntxiv, vim muaj cov khoom noj khoom haus ntau, lawv siv cov khoom noj hauv av - nitrogen thiab sulfur, nrog rau phosphorus - ua rau lawv tsis muaj rau cov nroj tsuag ib ntus.
"Nyob rau hauv npog cov qoob loo, tej zaum koj yuav xav siv tus nqi siab dua ntawm cov pib uas muaj tag nrho peb lub ntsiab," Ferrie hais.
N, P thiab S Cov Lus Qhia Tso Npe
"Qhov chaw phosphorus qhov twg cov tub ntxhais hluas cov hauv paus hniav tuaj yeem nrhiav tau sai vim tias nws tsis txav mus rau hauv av," Ferrie hais. "Tsawg rau saum npoo tom qab cog, nws yuav tsis txav mus nrawm txaus los muab cov lus teb pib. Brace cov hauv paus hniav yuav khaws nws tom qab, tab sis qhov ntawd nyob deb dhau rau lub caij loj hlob, thiab koj yuav poob pob ntseg girth. Tus nqi ntawm phosphorus nyob ib sab ntawm lub furrow thiab ze rau cov noob qhov tob los yog me ntsis hauv qab no uas teeb tsa ib lub relay uas yuav ua rau cov nroj tsuag thauj nrog txawm tias cov av kub poob tom qab cog.
"Sulfate sulfur tuaj yeem muab tso rau hauv ib qho ntawm ib sab ntawm kab lossis sab laug ntawm qhov chaw, qhov chaw nws yuav txav los nrog nag," Ferrie piav qhia. “Cia li ceev faj muab leej faj tso rau hauv qhov quav vim nws tuaj yeem hlawv cov noob.
"Nitrogen tuaj yeem siv rau ntawm qhov chaw ntawm kev cog qoob loo lossis koom nrog los ntawm kev rub cov saw hlau (tab sis cov chiv tuaj yeem splatter mus rau hauv lub planter nyob rau hauv cov huab cua). Koj tuaj yeem xav tau ob lub tshuab: ib qho siv phosphorus thiab ib qho rau nitrogen thiab sulfur los yog koj tuaj yeem khi txhua yam 2 "hauv qab ntawm qhov chaw thiab 2" ntawm cov noob furrow."
Yuav Ua Li Cas Sijhawm, Qhov Chaw Ua Haujlwm cuam tshuam rau cov khoom lag luam
Qhov kev tshawb fawb hauv Farm Journal no qhia txog qhov khoom plig muaj peev xwm, thiab kev pheej hmoo, los ntawm kev sib cais-siv nitrogen chiv. Kev sim 1 thiab 2 nyob rau hauv Ipava silt loam thiab sim 3, 4 thiab 5 nyob rau hauv Sable silt loam. Tag nrho 200 lb. nitrogen tau siv. Hauv txhua qhov kev sim, 30 lb. ib acre ntawm nitrogen tau siv nrog cov cog. Txoj kev tshawb no piv cov kev kho mob no:
Kev thov ib nrab ntawm nitrogen ntawm theem V6 ib txwm tau txais txiaj ntsig ntau dua li kev siv tag nrho ua ntej cog. Tab sis kev siv ib nrab ntawm nitrogen ntawm VT theem yielded tsawg. "Ob yam tau los ua si," hais tias Farm Journal field agronomist Ken Ferrie. "Ua ntej, tos rau sidedress ntawm VT theem ua rau cov pob kws muaj kev ntxhov siab thaum lub sij hawm loj hlob sai. Cov lus zais ntawm cov qoob loo siab yog kom tsis txhob cia cov pob kws nroj tsuag muaj hnub phem. peb siv nitrogen nyob rau theem VT, huab cua tig qhuav Cov pob kws lig-sidedressed tig daj thiab tsis zoo kom txog thaum nws los nag plaub lub lis piam tom qab, los ntawm lub sij hawm ntawd cov nroj tsuag nyob rau theem R3.
Fertility yog ib txoj cai sib npaug
Qhov ua kom yuam kev rau kev siv 4Rs thaum koj hloov los ntawm kab rov tav mus rau ntsug ua liaj ua teb yog siv cov khoom siv tau zoo tshaj plaws, tus nqi, sijhawm thiab kev tso kawm yam tsis tas siv cov chiv ntxiv. Dhau li ntawm kev saib xyuas zoo, ua raws li 4Rs tuaj yeem tsim nyog rau koj rau kev them nyiaj los ntawm kev txhawb nqa. Nov yog qee txoj hauv kev los ua kom muaj txiaj ntsig zoo tshaj plaws:
- Suav pib chiv ua ib feem ntawm koj daim ntawv thov tag nrho,tsis yog ib qho ntxiv rau nws.
- Tshaj tawm nitrogen thiab sulfur,nyob rau hauv qhuav chiv los yog ib tug herbicide cab kuj, txo tus nqi ntawm planter chiv koj yuav tsum tau thov. Txawm li cas los xij, daim ntawv thov banded ntawm kev cog yog tsawg kawg yog ob zaug ua haujlwm tau zoo. "Koj yuav pom cov lus teb loj dua rau 30 lb. ntawm nitrogen ib acre thov nrog cov cog ntau dua li 60 lb. ib daim acre tshaj tawm," hais tias Farm Journal field agronomist Ken Ferrie, hais txog kev tshawb fawb hauv teb.
- Siv tus nqi pib dua yog tias koj tab tom cuam tshuam nrog cov qoob loolos yog txuas ntxiv pob kws residue los them rau cov pa roj carbon ntau dua. Tom qab lub caij nplooj zeeg qhuav, nco ntsoov tias koj yuav muaj cov seem ntxiv thiab cov pa roj carbon ntau dua rau lub caij nplooj ntoo hlav tom ntej.
- Qee qhov kev txhawb zog them nyiaj rau cov neeg cog qoob loo kom txo lawv cov nitrogen.Ua ntej tso npe kawm, muab cov phiaj xwm sim los ntsuas qhov tshwm sim. Yog tias koj txo koj cov nqi nitrogen tag nrho, faib koj daim ntawv thov kom ua tau zoo dua. Ntsuas cov av rau nitrate thaum lub sij hawm sidedressing kom paub tseeb tias cov qoob loo tsis tshaib plab. "Nyob rau hauv ntau thaj chaw, ob peb xyoos dhau los tau ua phooj ywg rau cov nqi nitrogen tsawg vim tias huab cua qhuav lawm," Ferrie hais. "Tsis txhob raug ntes yog tias lub caij ntuj sov dhau los ntub."
- Nco ntsoov siv nitrogen txaus kom nqa pob kws zoo mus rau theem kev loj hlob sai.Ferrie hais tias "Lub hom phiaj ntawm nitrogen uas peb sidedress yog rau grain sau tom qab pollination," Ferrie hais. "Yog tias koj tsis siv cov nitrogen txaus rau pem hauv ntej los muab cov pob kws zoo rau hauv theem kev loj hlob sai, nws yog ib qho tseem ceeb uas koj tsis txhob ncua sij hawm ntawm koj daim ntawv thov sab nrauv."
