Compost-nitrogen synergies improve nutrition and growth in citrus rootstocks

IF 4.2 2区农林科学 Q1 HORTICULTURE

Scientia Horticulturae Pub Date : 2025-09-01 DOI:10.1016/j.scienta.2025.114424

Mojtaba Mahmoudi , Mostafa Farajpour

引用次数: 0

Abstract

Excessive use of mineral nitrogen fertilizers undermines soil health and sustainability in citrus production. Compost offers a promising alternative, but its interaction with nitrogen and rootstock remains unclear. A factorial experiment was established using Thomson Navel orange grafted onto Citrumelo, Citrange, and Sour Orange rootstocks to evaluate the combined effects of sulfur-enriched compost (0–7.5 % w/w) and ammonium sulfate (0–80 mg N kg⁻¹ soil). Moderate compost (2.5–5 %) combined with moderate nitrogen (≈40 mg kg⁻¹) improved growth and balanced leaf nutrition, while excessive nitrogen reduced uptake of key nutrients. Compost enhanced micronutrients (Mn, Cu), and rootstock strongly influenced Fe and Zn. These results highlight that partial substitution of synthetic nitrogen with compost, adjusted to rootstock responses, is a practical and climate-smart strategy for sustainable citrus management.

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堆肥-氮协同作用改善柑橘砧木的营养和生长

矿质氮肥的过量使用破坏了柑橘生产中土壤的健康和可持续性。堆肥提供了一个很有前途的选择，但它与氮和砧木的相互作用尚不清楚。以汤姆孙脐橙嫁接于Citrumelo、Citrange和酸橙砧木上，建立析因试验，评价富硫堆肥（0 - 7.5% w/w）和硫酸铵（0-80 mg N kg⁻¹土）的复合效果。适量的堆肥（2.5 - 5%）加上适量的氮（≈40 mg kg⁻）可以促进生长和平衡叶片营养，而过量的氮会减少对关键营养物质的吸收。堆肥增加微量元素（锰、铜），砧木对铁、锌的影响较大。这些结果表明，用堆肥部分替代合成氮，并根据砧木的反应进行调整，是可持续柑橘管理的一种实用和气候智能型策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scientia Horticulturae 农林科学-园艺

CiteScore

8.60

自引率

4.70%

发文量

796

审稿时长

47 days

期刊介绍： Scientia Horticulturae is an international journal publishing research related to horticultural crops. Articles in the journal deal with open or protected production of vegetables, fruits, edible fungi and ornamentals under temperate, subtropical and tropical conditions. Papers in related areas (biochemistry, micropropagation, soil science, plant breeding, plant physiology, phytopathology, etc.) are considered, if they contain information of direct significance to horticulture. Papers on the technical aspects of horticulture (engineering, crop processing, storage, transport etc.) are accepted for publication only if they relate directly to the living product. In the case of plantation crops, those yielding a product that may be used fresh (e.g. tropical vegetables, citrus, bananas, and other fruits) will be considered, while those papers describing the processing of the product (e.g. rubber, tobacco, and quinine) will not. The scope of the journal includes all horticultural crops but does not include speciality crops such as, medicinal crops or forestry crops, such as bamboo. Basic molecular studies without any direct application in horticulture will not be considered for this journal.