Sustainable effective use of brackish and canal water for rice-wheat crop production and soil health | Trajnostna in učinkovita raba brakične in vodovodne vode za pridelavo riža in pšenice in ohranjanje zdravja tal

anglais. A pot study was conducted to develop reasonable irrigation scheduling methods for rice-wheat crop rotation by conjunctive use of low-quality brackish water and good quality canal water. Treatments tested were; T1 (canal water), T2 (brackish water), T3 (brackish water for rice and canal water for wheat), T4 (last two irrigations to rice, and initial two irrigations to wheat with canal water), T5 (last two irrigations to rice but two initial and one last irrigation to wheat with canal water). Results revealed that irrigation with canal water resulted in the maximum mean biomass and grain yield of rice and wheat crops followed by cyclic use of brackish and canal water. While continuous irrigation with brackish water resulted the lowest mean biomass and grain yield. The different modes of irrigations also influenced chemical properties of soil, brackish water adversely affected the soil properties, and maximum pH of soil saturated paste (pHs), electrical conductivity of soil extract (ECe) and sodium adsorption ratio (SAR) were recorded where brackish water was used continuously. Therefore, it was concluded that when water is valuable and freshwater resources are limited, cyclic use of the canal and brackish water is also profitable with marginal effect on biomass and grain yield and proves least detrimental for soil health.

slovène. Izveden je bil lončni poskus za razvoj načrta smiselnega namakanja v kolobarju riža in pšenice s hkratno uporabo brakične vode slabe kakovosti in kakovostno vodo iz vodovoda. Obravnavanja so obsegala: T1 (voda iz vodovoda), T2 (brakična voda), T3 (brakična voda za riž in voda iz vodovoda za pšenico), T4 (dve zadnji namakanji riža in začetno namakanjem pšenice z vodo iz vodovoda), T5 (dve zadnji namakanji riža, dve začetni in zadnje namakanje pšenice z vodo iz vodovoda). Rezultati so pokazali, da je namakanje z vodo iz vodovoda dalo največjo poprečno biomaso in največji pridelek zrnja riža in enake rezultate pri pšenici pri izmenični rabi brakične in vodovodne vode. Stalno namakanje z brakično vodo je dalo najmanjšo poprečno biomaso in najmanjši pridelek zrnja. Različni načini namakanja so vplivali tudi na kemijske lastnosti tal. Brakična voda je nanje vplivala negativno. Pri njeni stalni uporabi je bil zabeležen najvišji pH tal(pHs), največja električna prevodnost izvlečka tal (ECe) in največja adsorpcija natrija (SAR). Na osnovi tega lahko zaključimo, da je tam, kjer so viri sladke vode omejeni, izmenična uporaba brakične in vodovodne vode donosna saj ima majhen učinek na biomaso in pridelek zrnja in se izkaže manj škodljiva za zdravje tal.