dhaan

oraayja saitiva
Gealypic5.JPG
vaigyaanik vargeekaran
jagat: paadap
(ashrenikrut) enjiyosparm
(ashrenikrut) ekabeejapatri
(ashrenikrut) kaumelinid
gan: poales
kul: poaasi
prajaati: Oryza
jaati: O saitiva
dvipd naam
oraayja saitiva
khulana, Bangladesh mein do dhaan ke kheton ke alaava
Bangladesh mein dhaan (chaaval) ke khet
dhaan ki baali (anaaj wala bhaag)

dhaan (Paddy / oraayja saitiva) ek pramukh fasal hai jisse chaaval nikaala jaata hai. yeh Bhaarat sahit Asia evam vishv ke bahut se deshon ka mukhya bhojan hai. vishv mein makka ke baad dhaan hi sabse adhik utpann hone wala anaaj hai.

oraayja saitiva (jiska prachalit naam 'Asiaee dhaan' hai) ek paadap ki jaati hai. iska sabse chhota jeenom hota hai (maatr 430 M.bi.) jo keval 12 kromojom mein seemit hota hai. ise saralata se jenetikli antaran karne laayak hone ki kshamata hetu jaana jaata hai. yeh anaaj jeev-vigyaan mein ek model jeev maana jaata hai.

anukram

dhaan ke utpaadan ke liye bhaugolik kaarak

  • utpaadak katibndh
  • taapamaan -25
  • varsha -100
  • mitti -kali

dhaan ke utpaadan ka vishv vitran

paka hua chaaval (bhaat)
Chhattisgarh ka aushadheeya dhaan
niymagiri parvat kshetr ka aushadheeya dhaan

dhaan ke rog

rogon ka vistaar taapamaan evam anya jalavaayu sambandhi kaarako par nirbhar karta hai tatha saath hi sasya-kriyaaon ka bhi prabhaav padta hai. dhaan ke mukhya rogon ko unke kaarakon ke aadhaar par teen bhaagon mein baaainta jaata hai:

kavakeeya rog (Fungal)- kavak ke kaaran utpann rog

  • badara (Blast)
  • tanaagalan (Stem rot)
  • talagalan evam bakaane (Foot rot & bakanae)
  • parnachhad galan (Sheath rot)
  • parnachhad angamaari (Sheath blight)
  • bhoori-chitti (Brown spot)
  • aabhaasi kaangiyaari (False smut)
  • udabatta (Udbatta)

jeevaanuj rog (Bacterial) - jeevaanuon ke kaaran utpann rog

  • jeevaanuj patti angamaari (Bacterial leaf blight)
  • jeevaanuj patti rekha (Bacterial leaf streak)

vaairas rog (Virus) - vaairas ke kaaran utpann rog

  • tungro (Tungro)
  • ghaaseeya-vruddhi rog (Grassy stunt)

inhein bhi dekhein

baahari kadiyaaain