CAJ | 학술논문

利用室内盆栽试验,研究了较低肥力菜田土壤上不同施肥量及减量施肥配合不同氮素调控剂处理对油菜生长、硝酸盐含量以及土壤硝态氮含量和氮肥利用率变化的影响。结果表明：无论是根施调控剂还是不同叶面调控剂处理都有效提高了油菜的生物学产量;根施双氰胺复合硝化抑制调控剂（根调）以及叶面喷施调控剂1和调控剂2处理显著降低了油菜硝酸盐含量,降幅分别达到62.8%、70.3%和73.4%;根调和叶面喷施肥＋扩展剂调控处理也有效地降低了土壤硝态氮含量,提高了氮肥利用率,根调以及叶面调控剂处理下氮肥利用率大幅提高,尤其是根调处理下最高达到61.0%,氮素表观损失量降低,根调处理下最高达68.4%。以上结果说明,较低肥力菜田土壤适量施肥条件下,氮素调控剂如双氰胺复合硝化抑制调控剂的合理施用在保证蔬菜产量基础上,不仅有利于降低蔬菜硝酸盐含量,而且有利于提高氮素利用率,减少肥料氮素环境损失量。
이용실내분재시험,연구료교저비력채전토양상불동시비량급감량시비배합불동담소조공제처리대유채생장、초산염함량이급토양초태담함량화담비이용솔변화적영향。결과표명：무론시근시조공제환시불동협면조공제처리도유효제고료유채적생물학산량;근시쌍청알복합초화억제조공제（근조）이급협면분시조공제1화조공제2처리현저강저료유채초산염함량,강폭분별체도62.8%、70.3%화73.4%;근조화협면분시비＋확전제조공처리야유효지강저료토양초태담함량,제고료담비이용솔,근조이급협면조공제처리하담비이용솔대폭제고,우기시근조처리하최고체도61.0%,담소표관손실량강저,근조처리하최고체68.4%。이상결과설명,교저비력채전토양괄량시비조건하,담소조공제여쌍청알복합초화억제조공제적합리시용재보증소채산량기출상,불부유리우강저소채초산염함량,이차유리우제고담소이용솔,감소비료담소배경손실량。
Indoor pot experiment on the effects of different fertilizer doses treatments and nitrogen reduction application combined with nitrogen regulating agents on rape growth,nitrate content in plant and in soils,and nitrogen use efficiency were conducted.The results showed that regulating agents applied both in roots and on leaves improved effectively the yield of rapeseed;the treatments of dicyandiamide nitrification inhibiting compound agents applied in roots（root regulation）and foliar spray regulating agent 1 and 2 reduced significantly the nitrate content in rapeseed,with a decline of 62.8%,70.3% and 73.4% respectively;the root regulation and the foliar spray fertilizer combined with spreading agent also reduced obviously the soil nitrate content,and improved the nitrogen use efficiency（up to 61.0% by root regulation）,and reduced the apparent loss of nitrogen（up to 68.4% by root regulation）.The results suggested that under the conditions of appropriate amount fertilizer application to the vegetable soil with lower fertility,the rational application of the nitrogen-regulating agents such as dicyandiamide nitrification inhibiting compound,could not only help to reduce the nitrate content in vegetables,but also be conducive to improve nitrogen use efficiency,reduce nitrogen loss and ensure the production of vegetables.