EFFECTS OF SOIL TEMPERATURE ON PHOSPHORUS EXTRACTABILITY. I. EXTRACTIONS AND PLANT UPTAKE OF SOIL AND FERTILIZER PHOSPHORUS
EFFECTS OF SOIL TEMPERATURE ON PHOSPHORUS EXTRACTABILITY. I. EXTRACTIONS AND PLANT UPTAKE OF SOIL AND FERTILIZER PHOSPHORUS
复制标题
土壤温度对磷提取率的影响。
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
G. Racz
中科院分区：
文献类型：
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作者：
S. Sheppard;G. Racz
在含有游离碳酸盐(pH 7.8)和非碳酸盐(pH 6.9)的两种土壤上，研究了10、15、20和25℃的土壤温度对土壤和肥料磷(P)浸提性的影响。监测固定和解吸反应的时间进程。还用碳酸氢钠(NaHCO3)萃取物、解吸曲线和小麦幼苗的短期吸收来评估P的可萃取性。磷-32在整个过程中被使用。温度的影响是相反的。培养温度从10℃升高到25℃时，施用量减少，可能是由于加速了固定反应。这种作用是在施P后第1天出现的，并持续了57天。高于相应孵化温度的萃取温度增加了P的萃取率，表明P是吸热脱附反应。这一效应在提取开始后1 h即可建立，并持续48 h。
The effect of 10, 15, 20 and 25 °C soil temperatures on the extractability of soil and fertilizer phosphorus (P) was examined in two soils, one containing free carbonate (pH 7.8) and the other non-carbonated (pH 6.9). The time course of fixation and desorption reactions were monitored. The extractability of P was also assessed using sodium bicarbonate (NaHCO3) extractions, desorption curves, and short-term uptake by wheat seedlings. Phosphorus-32 was used throughout. Opposing effects of temperature were found. An increase in incubation temperature from 10 to 25 °C decreased the amount of applied P extracted probably due to accelerated fixation reactions. This effect was established 1 day after the P was applied and persisted for 57 days. An increase in extraction temperature over the corresponding incubation temperature increased the extractability of P, indicating endothermic desorption reactions. This effect was established 1 h after the extraction began and persisted for 48 h. Hence, the net effect of ...