|Cov Lus Qhia Luv Luv|

Siv cov noob ryegrass ua cov khoom siv sim, txoj kev cog qoob loo 32-phaj plug tray matrix tau siv los kawm txog cov teebmeem ntawm cov nqi cog (7, 14 noob/phaj) ntawm peb qhov kev sau qoob loo ntawm cov noob ryegrass uas cog nrog lub teeb LED dawb (hnub tim 17, 34, 51) cuam tshuam rau cov qoob loo. Cov txiaj ntsig qhia tau tias cov noob ryegrass tuaj yeem loj hlob zoo li qub hauv qab lub teeb LED dawb, thiab qhov ceev rov qab los sai tom qab txiav, thiab nws tuaj yeem tsim tau raws li ntau txoj kev sau qoob loo. Qhov nrawm ntawm kev cog noob muaj qhov cuam tshuam loj rau cov qoob loo. Thaum peb qhov kev txiav, qhov ntau ntawm 14 noob/phaj siab dua li ntawm 7 noob/phaj. Qhov ntau ntawm ob qhov nrawm ntawm kev cog noob tau qhia txog qhov sib txawv ntawm thawj zaug txo qis thiab tom qab ntawd nce ntxiv. Tag nrho cov qoob loo ntawm 7 noob/phaj thiab 14 noob/phaj yog 11.11 thiab 15.51 kg/㎡, raws li, thiab lawv muaj peev xwm rau kev siv lag luam.

Cov Khoom Siv thiab Cov Txheej Txheem

Cov Khoom Siv thiab Cov Txheej Txheem Xeem

Qhov kub hauv lub Hoobkas cog qoob loo yog 24 ± 2 °C, qhov av noo yog 35% -50%, thiab CO2 concentration yog 500 ± 50 μmol/mol. Lub teeb LED dawb nrog qhov loj ntawm 49 cm × 49 cm tau siv rau kev teeb pom kev zoo, thiab lub teeb vaj huam sib luag tau muab tso rau 40 cm saum lub tais ntsaws. Qhov piv ntawm lub matrix yog peat: perlite: vermiculite = 3:1:1, ntxiv dej distilled kom sib tov sib npaug, kho cov dej kom txog 55% ~ 60%, thiab khaws cia rau 2 ~ 3 teev tom qab lub matrix nqus dej tag nrho thiab tom qab ntawd muab tso rau hauv 54 cm × 28 cm hauv 32-qhov ntsaws. Xaiv cov noob uas plump thiab sib npaug hauv qhov loj rau kev tseb.

Kev Tsim Qauv Xeem

Lub zog ntawm lub teeb dawb LED yog teem rau 350 μmol/(㎡/s), qhov kev faib tawm spectral yog raws li pom hauv daim duab, lub sijhawm kaj-tsaus yog 16 h/8 h, thiab lub sijhawm kaj yog 5:00 ~ 21:00. Ob qhov ceev ntawm 7 thiab 14 noob/qhov tau teem rau kev tseb. Hauv qhov kev sim no, cov noob tau tseb rau lub Kaum Ib Hlis 2, 2021. Tom qab tseb, lawv tau tseb hauv qhov tsaus ntuj. Lub teeb tau pib rau lub Kaum Ib Hlis 5. Thaum lub sijhawm tseb lub teeb, cov kua zaub mov Hoagland tau ntxiv rau hauv lub tais noob.

Spectrum rau LED teeb dawb

Cov Cim Qhia thiab Cov Txheej Txheem Sau Qoob Loo

Saib seb thaum qhov siab nruab nrab ntawm cov nroj tsuag ncav cuag qhov siab ntawm lub teeb vaj huam sib luag, sau nws. Lawv tau txiav rau lub Kaum Ib Hlis 22, Lub Kaum Ob Hlis 9 thiab Lub Kaum Ob Hlis 26, raws li, nrog rau lub sijhawm ntawm 17 hnub. Qhov siab ntawm cov ceg ntoo yog 2.5 ± 0.5 cm, thiab cov nroj tsuag tau xaiv random hauv 3 qhov thaum lub sijhawm sau qoob loo, thiab cov ryegrass sau tau raug hnyav thiab sau tseg, thiab cov qoob loo ib square meter tau suav hauv cov mis (1). Cov qoob loo, W yog qhov hnyav tshiab ntawm txhua cov ceg ntoo txiav.

Cov qoob loo = (W × 32) / 0.1512 / 1000 (kg / ㎡)

(Cheeb tsam phaj = 0.54 × 0.28 = 0.1512 ㎡) (1)

Cov Txiaj Ntsig thiab Kev Tshawb Fawb

Hais txog qhov nruab nrab ntawm cov qoob loo, cov qauv qoob loo ntawm ob qhov cog qoob loo yog thawj qoob loo > qhov thib peb qoob loo > qhov thib ob qoob loo, 24.7 g > 15.41 g > 12.35 g (7 noob/qhov), 36.6 g > 19.72 g, raws li. > 16.98 g (14 lub tshuaj/qhov). Muaj qhov sib txawv tseem ceeb ntawm ob qhov cog qoob loo hauv cov qoob loo ntawm thawj qoob loo, tab sis tsis muaj qhov sib txawv tseem ceeb ntawm qhov thib ob, thib peb qoob loo thiab tag nrho cov qoob loo.

Cov teebmeem ntawm kev cog qoob loo thiab lub sijhawm txiav stubble rau cov qoob loo ryegrass

Raws li cov phiaj xwm txiav sib txawv, lub voj voog tsim khoom raug suav. Ib lub voj voog txiav yog 20 hnub; ob qhov txiav yog 37 hnub; thiab peb qhov txiav yog 54 hnub. Qhov nrawm ntawm 7 noob/qhov muaj qhov tsawg tshaj plaws, tsuas yog 5.23 kg/㎡. Thaum qhov nrawm ntawm 14 noob/qhov, qhov nrawm ntawm 3 qhov txiav yog 15.51 kg/㎡, uas yog li 3 npaug ntawm qhov nrawm ntawm 7 noob/qhov txiav 1 zaug, thiab siab dua lwm lub sijhawm txiav. Lub sijhawm ntev ntawm peb qhov kev txiav yog 2.7 npaug ntawm ib qho txiav, tab sis qhov nrawm tsuas yog li 2 npaug ntawm ib qho txiav. Tsis muaj qhov sib txawv ntawm qhov nrawm thaum qhov nrawm ntawm 7 noob/qhov txiav 3 zaug thiab 14 noob/qhov txiav 2 zaug, tab sis qhov sib txawv ntawm ob txoj kev yog 17 hnub. Thaum tus nqi cog noob yog 14 noob/qhov txiav ib zaug, qhov txiaj ntsig tsis txawv ntawm 7 noob/qhov txiav ib lossis ob zaug.

Kev tsim tawm ntawm cov nyom ryegrass 1-3 zaug txiav hauv ob qhov kev cog noob

Thaum tsim khoom, yuav tsum muaj cov txee tsim nyog, qhov siab ntawm txee, thiab tus nqi cog noob kom nce cov qoob loo ib cheeb tsam, thiab kev txiav nyom raws sijhawm yuav tsum tau ua ke nrog kev soj ntsuam zoo ntawm cov khoom noj khoom haus kom txhim kho cov khoom zoo. Cov nqi kev lag luam xws li noob, cov neeg ua haujlwm, thiab kev khaws cov nyom tshiab kuj yuav tsum tau xav txog. Tam sim no, kev lag luam nyom kuj ntsib teeb meem ntawm lub kaw lus ncig khoom tsis zoo thiab qib kev lag luam qis. Nws tsuas yog tuaj yeem ncig mus rau hauv thaj chaw hauv zos, uas tsis zoo rau kev ua tiav kev sib xyaw ntawm cov nyom thiab tsiaj txhu thoob plaws lub tebchaws. Kev tsim cov nroj tsuag tsis tsuas yog ua rau lub voj voog sau qoob loo ntawm ryegrass luv dua, txhim kho tus nqi tsim tawm ib cheeb tsam, thiab ua tiav kev muab cov nyom tshiab txhua xyoo, tab sis kuj tuaj yeem tsim cov chaw tsim khoom raws li kev faib tawm hauv cheeb tsam thiab kev lag luam ntawm kev yug tsiaj, txo cov nqi logistics.

Kev Txheeb Xyuas

Hauv kev xaus lus, nws muaj peev xwm tsim cov nyom ryegrass hauv qab lub teeb LED. Cov qoob loo ntawm 7 noob/qhov thiab 14 noob/qhov ob qho tib si siab dua li cov qoob loo thawj zaug, qhia tib qho kev sib txawv ntawm thawj zaug txo qis thiab tom qab ntawd nce ntxiv. Cov qoob loo ntawm ob qho kev cog noob tau txog 11.11 kg/㎡ thiab 15.51 kg/㎡ ntawm 54 hnub. Yog li ntawd, kev tsim cov nyom ryegrass hauv cov chaw cog qoob loo muaj peev xwm rau kev siv lag luam.

Sau: Yanqi Chen, Wenke Liu.

Cov ntaub ntawv hais txog:

Yanqi Chen, Wenke Liu. Cov nyhuv ntawm kev cog noob rau ntawm cov qoob loo ryegrass nyob rau hauv lub teeb dawb LED [J]. Agricultural Engineering Technology, 2022, 42 (4): 26-28.