Soil amendments are used to increase the solubility of phosphate rocks (PRs) such that they can supply phosphorus (P) to high P-demanding crops. Zeolites are naturally occurring aluminosilicate minerals that can solubilize PRs and increase P nutrient supply. This study sought to evaluate the effects of zeolite addition in PR mixtures in dry matter yield (DMY), nutrient accumulation, and alfalfa’s agronomic efficiency. The experiment was conducted in a greenhouse where treatments comprised of two zeolites types (clinoptilolite and stilbite), three P sources (triple superphosphate-TSP, Morocco PR, and Cajati PR), five P levels (0, 22, 44, 87, and 131 mg kg⁻¹), and five zeolites ratios (w/w) based on P₂O₅ levels (0, 25, 50, 100, and 200%). Eleven cuts of alfalfa were taken to quantify DMY and P accumulation. Alfalfa dry matter yield and P accumulation increased due to P fertilization. Reactive PR (Morocco) was more effective than TSP to increase alfalfa DMY and P accumulation. Phosphorus levels in soil did not increase with reactive PR (Morocco) fertilization and zeolite amendment. Zeolite stilbite just increased P solubilization and accumulation by alfalfa plants in a 150–200% ratio (zeolite/PR) with the low-reactive PR (Cajati). Under this experiment’s conditions, zeolite was not an efficient amendment combined with P soluble and reactive PR sources to increase alfalfa DM yield and P accumulation. Large amounts of zeolite were necessary to provide the low-efficiency PR source solubilization to satiate alfalfa P demand.

土壤改良剂用于增加磷矿（PR）的溶解度，以便它们可以向高磷需求农作物供应磷（P）。沸石是天然存在的铝硅酸盐矿物，可溶解PRs和增加P营养素的供应。这项研究试图评估在PR混合物中添加沸石对干物质产量（DMY），养分积累和苜蓿农艺效率的影响。实验是在温室中进行的，温室中的处理包括两种沸石类型（斜发沸石和闪锌矿），三种磷源（三过磷酸钙-TSP，摩洛哥PR和卡贾蒂PR），五个磷水平（0、22、44、87和131 mg kg ^-1）和基于P ₂ O _5的五个沸石比率（w / w）级别（0、25、50、100和200％）。切取11块苜蓿以量化DMY和P积累。紫花苜蓿的干物质产量和磷积累量因施磷而增加。反应性PR（摩洛哥）比TSP更有效地增加苜蓿DMY和P积累。活性PR（摩洛哥）施肥和沸石改良剂不会增加土壤中的磷含量。低反应性PR（Cajati）时，沸石闪锌矿以150-200％的比例（沸石/ PR）增加了苜蓿植物对P的溶解和积累。在该实验的条件下，沸石不是与P可溶性和反应性PR源结合使用以提高苜蓿DM产量和P积累的有效改良剂。为了满足苜蓿对磷的需求，需要大量的沸石来提供低效的PR源增溶作用。