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利用海藻寡糖(ADO)制备ADO与氮素比例(ADO/N)为1%~4%的ADO硝态、铵态、酰胺态增效氮肥,并以相应氮素形态的普通氮肥(不添加ADO)、多肽(Pasp)增效氮肥(Pasp含量为2%)为对照,进行盆栽试验。通过测定油菜在长出真叶后的第1天、第8天、第15天、第22天、第29天(DAE1,DAE8,DAE15,DAE22,DAE29)的干质量及植株全氮量,确定ADO增效氮肥中的最佳ADO/N及增效效果较好的氮素形态,研究ADO对不同形态氮素的影响。结果表明,ADO硝态、铵态、酰胺态增效氮肥的最佳ADO/N分别为2%,3%,2%,且ADO对酰胺态氮素的增效作用最好、最稳定,油菜在生长过程中未出现枯萎、萎蔫现象。试验结果为ADO增效氮肥的实际生产提供一定参考,对提高我国农业氮肥利用率、降低农业生产成本、推动绿色农业的发展具有重要意义。
ADO was used to prepare ADO nitrate, ammonium and amylose synergistic nitrogenous fertilizer with ADO and N ratio (ADO / N) of 1% ~ 4%, and the common nitrogen fertilizer with no nitrogen addition ADO) and Pasp (2% for Pasp) were used as control to conduct pot experiment. The dry weight and plant total nitrogen of rapeseed on the first day, the eighth day, the fifteenth day, the 22nd day and the 29th day (DAE1, DAE8, DAE15, DAE22 and DAE29) ADO synergistic nitrogen fertilizer in the best ADO / N and the synergistic effect of nitrogen forms, ADO on the impact of different forms of nitrogen. The results showed that the best ADO / N of ADO nitrate, ammonium and amide nitrogen were 2%, 3% and 2%, respectively, and ADO had the best synergistic effect on the amide nitrogen, the most stable was rape In the growth process did not appear withered, wilting phenomenon. The test results provide some references for the actual production of ADO efficiency nitrogen fertilizer, which is of great significance to improve the utilization rate of agricultural nitrogen fertilizer in our country, reduce the agricultural production cost and promote the development of green agriculture.