成長、資源効率、土壌温室効果ガス排出のバランス：Chukrasia tabularis実生苗の最適な水・肥料カップリング

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:The PCA-EWM-TOPSIS method offers a framework for multi-objective optimization in plant-soil systems, and the interaction effects between water and fertilizer inform future experimental design.

🏢実務担当者:Forestry managers can use the 55% field capacity + 12g pot⁻¹ fertilizer combination to improve seedling growth and reduce fertilizer waste, though validation in field conditions is needed.

過剰かつ無規制な水・肥料管理は、亜熱帯地域におけるChukrasia tabularis（C. tabularis）植林の生産性を制限している。1年生のC. tabularis実生を用いて、2因子要因配置のポット実験を実施した。3つの土壌含水率レベル（圃場容水量の95%、75%、55%）と4つの複合肥料施用量（0、6、12、18 g pot⁻¹）を設定し、圃場容水量の75%と0 g pot⁻¹の肥料処理を対照（CK）とした。土壌含水率がC. tabularis実生の成長を制御する主要因であることが明らかになった。さらに、水と肥料は総バイオマスと根乾燥重量に対して極めて有意な交互作用効果を示した（p < 0.001）。12 g pot⁻¹の肥料施用量では、圃場容水量55%で育成した実生は、圃場容水量75%のものより総バイオマスが35%多く、CKより224%多かった。また、根乾燥重量は対照より32%増加した。しかし、圃場容水量95%はすべての肥料処理下で成長を低下させた。圃場容水量55%の条件下では、12 g pot⁻¹の肥料施用量における窒素とカリウムの蓄積量は、CKと比較してそれぞれ701%と318%増加した。対照的に、圃場容水量95%の条件は深刻な根の低酸素症と養分溶脱を引き起こし、施肥の利点を実質的に無効化し、リンとカリウムの見かけの肥料利用率を負に導いた。圃場容水量55%では、観察されたCH₄パターンは、選択された処理下で正味排出から正味吸収への潜在的な移行を示唆した。PCA-EWM-TOPSIS複合モデルは、圃場容水量55%と12 g pot⁻¹の複合肥料の組み合わせが、成長便益、資源利用効率、および生態学的トレードオフの間で最適なバランスを達成することを実証した。

AI 翻訳（deepseek-v4-flash）。 正確を期す場合は下の原文を参照してください。

Excessive and unregulated management of water and fertilizer limits the productivity of Chukrasia tabularis ( C. tabularis ) plantations in subtropical regions. A two-factor factorial potted experiment was conducted using one-year-old C. tabularis seedlings. Three soil water content levels (95%, 75%, and 55% field capacity) and four compound fertilizer rates (0, 6, 12, and 18 g pot −1 ) were established, with the treatment of 75% field capacity and 0 g pot −1 fertilizer serving as the control (CK). Soil water content emerged as the dominant factor controlling C. tabularis seedling growth; furthermore, water and fertilizer exhibited a highly significant interaction effect on total biomass and root dry weight ( p  &amp;lt; 0.001). At the 12 g pot −1 fertilizer rate, seedlings grown at 55% field capacity produced 35% more total biomass than those at 75% field capacity, and 224% more than CK. It also raised root dry weight by 32% over the control. But 95% field capacity reduced growth under all fertilizer treatments. Under the 55% field capacity condition, nitrogen and potassium accumulation at the 12 g pot −1 fertilizer rate increased by 701% and 318%, respectively, compared to CK. In contrast, the 95% field capacity condition caused severe root hypoxia and nutrient leaching, effectively negating the benefits of fertilization and leading to negative apparent fertilizer use efficiency for phosphorus and potassium. At 55% field capacity, the observed CH 4 patterns suggested a potential shift from net emission to net uptake under selected treatments. A combined PCA-EWM-TOPSIS model demonstrated that a field capacity of 55% combined with 12 g pot −1 compound fertilizer achieved an optimal balance among growth benefits, resource use efficiency, and ecological trade-offs.

• crossref https://doi.org/10.3389/ffgc.2026.1914270first seen 2026-07-27 06:09:48 · last seen 2026-08-10 05:30:49