摘要
利用渗漏池模拟长江中游地区2种主要稻田土壤,研究了施用等P2O5量的有机肥(猪粪)和化肥对表面水总磷动态及其降水径流损失的影响.结果表明,施用化肥后,双季稻田表面水总磷均在施肥第1天就达到最高水平,然后迅速下降,而且晚稻的总磷浓度峰值显著高于早稻,有效磷含量高的河沙泥总磷峰值明显高于红黄泥.施用猪粪后,晚稻在第1天表面水总磷出现峰值,2种土壤分别较施化肥的提高了43.2%和66.9%,而且整个生长期总磷浓度均高于施用化肥的;早稻施肥后前3d表现较低的表面水总磷浓度,至7d后表面水总磷高于化肥处理的.双季稻种植制度下化肥和猪粪处理的磷素径流流失分别占施P量的0.86%和1.44%.早稻施肥后15d内发生2次径流,化肥和猪粪处理的径流液中总磷浓度较高,其总磷径流损失量分别占早稻生育期内总径流损失量的65.6%和60.8%.产量分析表明,施用猪粪和化肥的水稻产量差异不显著,但均显著高于不施肥处理.
Floodwater total phosphorus （TP） dynamics in rice-rice field and phosphorus loss by runoff after applying pig feces and chemical fertilizer of equal P2O5 content were studied by modelling two main soils in the middle reach of Yangtze River with lysimeter. The results showed that, floodwater TP concentrations in rice-rice field reached the highest level after applying fertilizer, then went down rapidly. And the TP peak from late-rice was higher than that from early-rice significantly; the TP peak from Aluvial loamy paddy soil with higher available P was higher than that from Reddish yellow paddy soil. Floodwater TP peak from late-rice occurred at the first day and increased by 43.2% and 66.9%, respectively, and TP concentrations in all the growing season were higher than that of fertilizer treatment after pig feces application; floodwater TP from early-rice showed relatiyely low concentrations within initial several days but rose higher than the fertilizer treatments after the 7 day pig manure treatment. The TP loss by runoff from fertilizer and pig feces treatments under rice-rice cropping system accounted for 0.86% and 1.44% of P applied, respectively. Within 15 days after applying fertilizer in early-rice, there occurred two runoff events, in which the runoff water TP concentrations from fertilizer and pig feces treatments were both much higher than that caused by other runoff events, and the TP loss by runoff accounted for 65.6% and 60.8% of total runoff TP loss during early-rice growing season, respectively. At last, analysis of rice-rice yields suggested thai there was not a significant difference of total rice yields between applying pig feces and fertilizer, but both were higher than that in control which did not receive any fertilizer significantly.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第3期283-287,共5页
Journal of Hunan Agricultural University(Natural Sciences)
基金
国家自然科学基金(30270770)
中加合作项目(HN-13)
关键词
稻田土壤
猪粪
表面水
总磷
径流
长江中游地区
paddy soil
pig feces
floodwater
total phosphorus
runoff
the middle reach of Yangtze River
