Yog xav paub ntxiv, daim ntawv thov no tau hais rau daim ntawv thov foliar ammonium polyphosphate fertilizer daws mus rau cov teb cov qoob loo los txhim kho txoj kev loj hlob, kev nyuab siab tsis kam, thiab siab tshaj plaws cog ntom ntawm cov qoob loo zoo li no.
Hauv av daim ntawv thov ntawm fertilizer thiab, nyob rau hauv kev, ntawm phosphate-muaj chiv xws li ammonium phosphate kom cov qoob loo yields, ntawm chav kawm, paub zoo. Thaum cov noob qoob loo txhua xyoo, cov phosphatecontaining fertilizers tau siv rau cov kua los yog cov ntaub ntawv ua ntej, ib txhij nrog, los sis tom qab mus rau, cog cov noob ntawm lub qoob loo yuav loj tuaj. Xws li chiv yog feem ntau ntawm cov hom phosphate tau muab pov tseg los ntawm cov nroj tsuag los ntawm qhov kev txiav txim ntawm cov kab mob hauv av thiaj li muab rau kev pov thawj b nroj tsuag dhau lub caij nyoog ntev.
Lub hom phiaj ntawm chiv daim ntawv thov yog, ntawm chav kawm, mus nce lub qoob loo output rau ib unit ntawm av. Txij thaum phosphorous, uas yog assimilated los ntawm cov nroj tsuag li phosphate ion, nws yog ib qho tseem ceeb uas yuav tsum tau loj loj rau cov kev loj hlob ntawm cov nroj tsuag, ib lub limiting factors hauv kev txiav txim siab txog qhov loj me thiab cov nroj tsuag uas tuaj yeem loj hlob rau ib qhov chaw ntawm thaj av yog tus nqi ntawm phosphorous muaj rau cov nroj tsuag thaum nws qhov kev loj hlob voj voog ntawm noob kom loj hlob. Vim tias txhua qhov chaw muaj cov phomphorous, feem ntau, qhov ntau ntxiv cov phosphorous, qhov ntau dua ntawm cov nroj tsuag uas yuav loj hlob ntawm ib thaj av muab.
Qhov no yuav raug rau peb qhov kev tsim nyog:
(1) Phosphorous yog, ntawm chav kawm, tsis yog qhov tseem ceeb ntawm kev cog kev loj hlob. Lwm cov ntsiab lus uas yuav tsum tau muaj los ntawm cov nroj tsuag loj dua yog nitrogen, potassium, calcium, magnesium, thiab sulphur. Tsis tas li ntawd, cov tshuaj micronutrients, piv txwv li, tooj liab, zinc, manganese, molybdenum, chlorine, boron, thiab hlau yuav tsum kuj yuav tsum tuaj nyob rau hauv lub cev tsawg dua;
(2) Cov phosphorous yuav tsum muaj nyob rau hauv ib daim ntawv uas ncaj qha los ntawm cov nroj tsuag (phosphate anion) los yog, yog, hloov tau los ntawm cov dej thiab av cov kab mob hauv cov ntawv li siv;
(3) Lub ntsiab lus ntawm qhov teeb meem yog thaum kawg uas dhau qhov ntau ntxiv ntawm av-phosphorous ua tiav ib qho kev txwv qis heev hauv cov qoob loo ntawm ib thaj av. Qhov teeb meem ntawm kev ua si, ntawm chav kawm, nws txawv nyob ntawm seb cov qoob loo, cov av, thiab cov kab mob kev nyuab, muaj dej thiab hnub ci, kub, thiab cov zoo li cas. Txawm li cas los xij, txawm nyob hauv cov dej ntau tshaj, tshav ntuj, thiab lwm yam, ib qho taw tes yog mus txog tom qab uas ntxiv ntxiv ntawm phosphate fertilizer rau cov av tsuas yog nce qoob hauv cov qoob loo. Lub point of diminishing economic rov qab yuav luag tsis dhau mus ua ntej qhov kev taw qhia sib ncov no mus txog; uas yog, qhov ntxiv phosphorous-muaj chiv thiab nws cov ntaub ntawv nqi ntau dua li cov qoob loo ntau ntxiv yog tsim nyog.