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Large Chestnut Trees ( Castanea sativa ) Respond Poorly to Liming and Fertilizer Application
Journal of Soil Science and Plant Nutrition ( IF 3.9 ) Pub Date : 2020-03-04 , DOI: 10.1007/s42729-020-00210-4
M. Ângelo Rodrigues , Soraia Raimundo , Abel Pereira , Margarida Arrobas

Abstract

Establishing a fertilization plan for large trees is particularly difficult due to the high soil volume that the roots exploit and the buffer effect of the perennial woody structure on the concentration of nutrients in the leaves. This work evaluates the response of chestnut, a very large tree, to different fertilizer solutions. The study was conducted in two chestnut orchards planted in acid soils that were subjected to the application of lime plus phosphorus (Lime+P), lime plus a compound NPK fertilizer (Lime+NPK), and an unfertilized control (Control). The effects of the treatments on soil properties, nutritional status and photosynthetic performance of the trees, and nut production, were assessed from field and laboratory analyses. Liming significantly increased soil pH and exchangeable calcium (Ca). Treatments did not significantly influence leaf P and K levels, although leaf N concentrations were significantly higher in the Lime+NPK treatment on two of the three sampling dates. In one of the trials, the average accumulated nut yield was higher in the Lime+NPK (71.7 kg tree−1) treatment compared with the control (59.6 kg tree−1) and the Lime+P (51.7 kg tree−1) treatments, although without significant differences at P < 0.05. Overall, the results show the chestnut tree to be a species tolerant of soil acidity. The results also show that the buffer capacity of the plant in regulating the nutrient concentration in the leaves seems to be higher for P than for N, and therefore, concentrations of N in the leaves require the regular application of the nutrient as a fertilizer.



中文翻译:

大型栗树(栗树)对石灰和肥料的施用反应较差

摘要

由于根系利用的土壤体积大,并且多年生木本结构对叶片中养分浓度的缓冲作用,为大型树木制定施肥计划尤其困难。这项工作评估了板栗(一种非常大的树)对不同肥料溶液的响应。该研究是在酸性土壤中种植的两个栗树果园中进行的,这些果园施以石灰加磷(Lime + P),石灰加复合NPK肥料(Lime + NPK)和未施肥的对照(对照)。通过田间和实验室分析评估了这些处理对土壤性质,树木营养状况和光合性能以及坚果产量的影响。石灰显着增加了土壤的pH值和可交换的钙(Ca)。尽管在三个采样日期中的两个采样日期,Lime + NPK处理中的叶片氮浓度明显更高,但处理并未显着影响叶片的P和K水平。在其中一项试验中,Lime + NPK(71.7千克树)的平均累积坚果产量更高-1)处理与对照(59.6 kg树-1)和Lime + P(51.7 kg树-1)处理相比,尽管在P  <0.05时无显着差异。总体而言,结果表明板栗树是一种能够耐受土壤酸度的物种。结果还表明,植物在调节叶片中养分浓度方面的缓冲能力似乎比磷高,因此,叶片中氮的含量需要定期施用养分作为肥料。

更新日期:2020-03-20
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