ACS Agricultural Science & Technology, Journal Year: 2023, Volume and Issue: 3(11), P. 1103 - 1112

Published: Nov. 7, 2023

The traditional use of soluble phosphate fertilizers in agriculture depletes finite global supplies and accounts for a major nonpoint source phosphorus pollution. In potting experiments, we tested whether two modified softwood biochars that strongly bind could fertilize romaine "Dragoon" lettuce while retarding P leaching. Modifications included doping with MgO (MgO-BC), or binding, postpyrolysis, cationic polymer, poly(diallyldimethylammonium) chloride (pDADMAC-BC). former sorbs via coordination nanoparticles coatings the latter through enhanced anion exchange. presterilized soil (SS) was mixture fine sand peat moss. test sets contained (3 2% g-C/g-SS) either preadsorbed added along same amount phosphate, all at rate 180 120 mg-P/pot. We also containing P-rich mineral dolomite. Control SS amended unmodified biochar, without MgO-BC but phosphate. All pots were fertilized weekly phosphate-free Hoagland nutrient solution. Sets biochars, gave dramatically higher plant yields than control dolomite sets. leached small fraction (0.1–23%) relative to controls Plant uptake Mg high MgO-doped induced toxic response when those incorporated uniformly powdered form. Arbuscular mycorrhizal fungi some decreased root:shoot ratio otherwise had little impact. results indicate can appreciably reduce leaching providing bioavailable crop growth.

Language: Английский