CAJ | 학술논문

模拟旱地条件进行盆栽试验,尝试用氯仿熏蒸-浸提法测定土壤供氮力.分析了熏蒸前后各种形态氮素含量的变化,并对黑麦草吸氮量与农田土壤熏蒸-浸提氮进行了相关性分析.结果表明:各种施肥处理以及不同土地利用方式下氯仿熏蒸-浸提氮与黑麦草吸氮量有明显的相关性,氯仿熏蒸浸提的硝态氮和有机氮与吸氮量均呈极显著相关,相关系数分别为0.938和0.942.氯仿熏蒸浸提全氮能全面可靠地反映土壤的供氮力,表明氯仿熏蒸浸提氮是一个良好的土壤供氮力指标,它可以用于估计农田土壤的供氮力.氯仿熏蒸浸提法测定土壤有效氮适于包括碱性土壤和水田土壤在内的各种类型土壤.
모의한지조건진행분재시험,상시용록방훈증-침제법측정토양공담력.분석료훈증전후각충형태담소함량적변화,병대흑맥초흡담량여농전토양훈증-침제담진행료상관성분석.결과표명:각충시비처리이급불동토지이용방식하록방훈증-침제담여흑맥초흡담량유명현적상관성,록방훈증침제적초태담화유궤담여흡담량균정겁현저상관,상관계수분별위0.938화0.942.록방훈증침제전담능전면가고지반영토양적공담력,표명록방훈증침제담시일개량호적토양공담력지표,타가이용우고계농전토양적공담력.록방훈증침제법측정토양유효담괄우포괄감성토양화수전토양재내적각충류형토양.
A study has been conducted to determine nitrogen supplying capacity in simulation of arid soil by pot experiment with chloroform fumigation-extraction method. The content of ammonium nitrogen, nitration nitrogen and total nitrogen were determined to study the relationship between uptake nitrogen by ryegrass and nitrogen content of different forms. The results showed a good correlation between uptake nitrogen by ryegrass and chloroform fumigation-extraction nitrogen under different fertilizer treatments. There was significant relativity between the content of chloroform fumigation extraction of nitrate, organic nitrogen and N uptake, with the correlation coefficient of 0.938 and 0.942, respectively. The chloroform fumigation extraction of soil total nitrogen can fully and reliably reflect the ability of soil nitrogen supplying, indicating that it is a satisfactory index of chloroform fumigation-extraction to evaluate nitrogen supplying capacity, and can be used to estimate nitrogen supplying capacity in farmlands. Chloroform fumigation-extraction method suitable for determinating soil available nitrogen, in various types of soil, including alkaline soil and paddy soil.