Duration of response to nitrogen and phosphorus applications in mid-rotation Pinus taeda

Duration of response to nitrogen and phosphorus applications in mid-rotation Pinus taeda
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轮作中期火炬松对氮磷施用的响应持续时间

DOI:
10.1016/j.foreco.2021.119578
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发表时间:
2021
影响因子:
3.7
通讯作者:
Campoe, Otávio C.
Campoe, Otávio C.
中科院分区:
农林科学1区
文献类型:
--
作者:
Albaugh, Timothy J.;Albaugh, Janine M.;Carter, David R.;Cook, Rachel L.;Cohrs, Chris W.;Rubilar, Rafael A.;Campoe, Otávio C.

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我们量化了一次性施用112、224和336 kg ha− 1元素氮(分别为112 N、224 N和336 N)与28或56 kg ha− 1元素磷在中轮伐期火炬松中的反应持续时间。台架.在美国东南部的32个地点和阿根廷的一个地点,应用后测量持续了10年,我们将Ricker模型拟合到每个处理的数据中,如果在我们的测量数据中没有观察到零增长反应。112 N、224 N和336 N治疗后的缓解持续时间分别为8年(测量)、14年(建模)和16年(建模)。对于112 N、224 N和336 N处理,从施肥到生长响应与零无差异时(无论是测量还是建模),每单位施氮量的相应生长响应分别为0.20、0.16和0.13 m3 kg − 1。我们推测,控制响应时间的机制与处理后随时间推移残留在叶片中的肥料氮量有关;以前的研究发现,施氮对叶片数量和叶片氮含量有很大的影响。基于再转运率估计从文献中的67%的肥料氮,每年,我们的研究结果表明,一个很好的相关性之间存在的生长反应和肥料氮的量留在叶子。
We quantified the response duration to one-time applications of 112, 224, and 336 kg ha−1of elemental nitrogen (112 N, 224 N, and 336 N, respectively) combined with 28 or 56 kg ha−1of elemental phosphorus in mid-rotationPinus taedaL. stands. Post-application measurements continued for 10 years at 32 sites in the southeastern United States and one site in Argentina, and we fit a Ricker model to data from each treatment in the event that a zero growth response was not observed in our measured data. The response duration was eight (measured), 14 (modeled), and 16 (modeled) years after treatment for the respective 112 N, 224 N, and 336 N treatments. The corresponding growth response per unit of applied nitrogen estimated from fertilization to when the growth response was not different from zero (whether measured or modeled) was 0.20, 0.16, and 0.13 m3kg−1for the 112 N, 224 N, and 336 N treatments, respectively. We hypothesized that the mechanism controlling the response duration was related to the amount of fertilizer nitrogen remaining in the foliage over time after treatment; previous studies found that nitrogen application had large impacts on the foliage amount and foliar nitrogen content. Based on retranslocation rate estimates from the literature of 67% of fertilizer nitrogen per year, our results suggest that a good correlation exists between the growth response and the amount of fertilizer nitrogen remaining in the foliage.
DOI: 10.1016/0378-1127(90)90046-e
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发表时间: 1984-01-01
影响因子: 2.2
作者:
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