Recovery of nitrogen fertiliser by drill-sown rice crops using best management practice: a
نویسندگان
چکیده
Context Optimising nitrogen (N) management strategies for drill-sown rice crops is essential minimising input costs growers and reducing the environmental impact of production. Aims The study aimed to determine recovery fertiliser-N in Australian crops, following current N fertiliser recommendations where two-thirds applied at sowing (pre-flood) one-third panicle initiation. Methods 15N-labelled urea was used quantify by field-grown on a Sodosol Vertosol, contributions pre-flood vs that initiation total Vertosol. Results Recovery 15N grain + straw ∼50% both soils, with further 20% recovered from roots soil depth 30 cm. (59%) significantly higher than (43%), likely due presence actively growing plant demand. Crops received took up more native unfertilised Vertosol; hence, apparent recoveries were 10–15% determined using urea. Conclusions 50% aboveground material indicates use efficiency similar dryland cereal Australia when best practice guidelines are followed.
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ژورنال
عنوان ژورنال: Crop & Pasture Science
سال: 2022
ISSN: ['1836-5795', '1836-0947']
DOI: https://doi.org/10.1071/cp21754