Monitoring fine root growth to identify optimal fertilization timing in a forest plantation: A case study in Northeast Vietnam

Autoři: Tran Van Do aff001;  Nguyen Toan Thang aff001;  Vu Tien Lam aff001;  Dang Van Thuyet aff001;  Phung Dinh Trung aff001;  Tran Hoang Quy aff001;  Nguyen Thi Thu Phuong aff001;  Ly Thi Thanh Huyen aff001;  Nguyen Huu Thinh aff001;  Nguyen Van Tuan aff001;  Dao Trung Duc aff001;  Dang Thi Hai Ha aff001;  Duong Quang Trung aff001;  Ho Trung Luong aff001;  Nguyen Thi Hoai Anh aff001;  Patrick Nykiel aff002
Působiště autorů: Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam aff001;  Independent Australian Researcher, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam aff002
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
doi: 10.1371/journal.pone.0225567


Fertilizer is applied widely to improve the productivity of plantations. Traditionally, fertilization is conducted in spring and/or in the early rainy season, and it is believed to support the growth of planted trees in the growing season. Little attention to date has been paid on identification of the optimal timing of fertilization and fertilizer dose. In this study, application of the fine root monitoring technique in identifying optimal fertilization timing for an Acacia plantation in Vietnam is described. The study used two fertilizer doses (100 and 200 g NPK/tree) and three fertilization timings (in spring; in the early rainy season; and based on the fine root monitoring technique to identify when the fine roots reach their growth peak). As expected fertilization timings significantly affected growth and above-ground biomass (AGB) of the plantation. Fertilization based on the fine root monitoring technique resulted in the highest growths and AGB, followed by fertilization in the early rainy season and then in spring. Applying fertilizer at 200 g NPK/tree based on the fine root monitoring technique increased diameter at breast height (DBH) by 16%, stem height by 8%, crown diameter (Dc) by 16%, and AGB by 40% as compared to early rainy season fertilization. Increases of 32% DBH, 23% stem height, 44% Dc, and 87% AGB were found in fertilization based on fine root monitoring technique compared to spring fertilization. This study concluded that forest growers should use the fine root monitoring technique to identify optimal fertilization timing for higher productivity.

Klíčová slova:

Fertilizers – Fine roots – Forests – Root growth – Seasons – Spring – Trees – Acacia


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Článek vyšel v časopise


2019 Číslo 11