农业环境科学学报Issue(6)：1166-1173,8.DOI:10.11654/jaes.2015.06.021
柠檬酸对温室土壤磷有效性的影响
Effects of Citric Acid on Phosphorus Availability for Soil in Greenhouse Field
摘要
Abstract
The utilization efficiency of phosphorus fertilizers in vegetable production under greenhouse condition is low in spite of its exces-sive use. Thus, it need to improve the availability of phosphorus and consequently reduce its application rate.In this study, a greenhouse trial was conducted to reveal the effects of citric acid on soil available phosphorus and tomato yield. Four phosphate fertilizer application rates(0, 96, 168, 240 kg·hm-2, denoted as P0, P1, P2, P3, respectively)and four citric acid levels(0, 0.42, 0.84, 1.26 kg·hm-2, denoted as CA0, CA1, CA2, CA3, respectively)were arranged with the method of completely random design. The results showed that soil pH decreased sig-nificantly(P<0.01)with the increment of citric acid addition level, and it decreased by 0.62 units for CA3P0 compared with CA0P0. With-out the phosphate fertilization phosphorus release from the soil pool was enhanced in the top 0~20 cm soil after citric acid addition. Howev-er, as shown by treatment CA3P3, overuse of citric acid decreased the available phosphorus content in this soil layer, but increased the con-tent in the 20~40 cm soil, which tend to leach to deep soil. The recommended application rates of citric acid and phosphate were 0.84 kg· hm-2(CA2)and 168 kg·hm-2(P2), respectively. This dosage not only produced a maximum tomato yield of 6.02 t·hm-2, but also reduced phosphate application by 30%compared with P3, implying a lower environmental risk of phosphorus leaching to the deep soil.关键词
温室/番茄/有效磷/柠檬酸/磷肥Key words
greenhouse/tomato/available phosphorus/citric acid/phosphate fertilizer分类
农业科技引用本文复制引用
房福力,姚志鹏,林伟,李玉中,徐春英,李巧珍..柠檬酸对温室土壤磷有效性的影响[J].农业环境科学学报,2015,(6):1166-1173,8.基金项目
国家科技支撑计划项目（2011BAD32B03）；国家自然科学基金项目（41301553）；中央级公益性科研院所基本业务费项目 （）
