湖南农业科学
湖南農業科學
호남농업과학
HUNAN AGRICULTURAL SCIENCES
2013年
21期
34-37,40
,共5页
水稻%氮肥%干物质积累%氮素利用效率
水稻%氮肥%榦物質積纍%氮素利用效率
수도%담비%간물질적루%담소이용효솔
rice%nitrogen fertilization%dry matter accumulation%utilization efficiency of nitrogen
采用大田试验，研究了3个施氮量处理对粳稻的干物质积累、籽粒产量、产量构成因素及氮肥利用效率的影响。结果表明：籽粒产量、有效穗数和每穗粒数随施氮量的增加呈增加趋势，结实率和千粒重则相反。抽穗期和成熟期各器官的干物质积累、含氮量和植株氮素积累量均随施氮量的增加呈增加的趋势。氮素生产效率、氮素吸收利用率、氮素农学利用率和氮素偏生产力4个氮素利用效率指标均随施氮量的增加呈下降的趋势，以氮素生产效率和氮素偏生产力的下降较为明显。
採用大田試驗，研究瞭3箇施氮量處理對粳稻的榦物質積纍、籽粒產量、產量構成因素及氮肥利用效率的影響。結果錶明：籽粒產量、有效穗數和每穗粒數隨施氮量的增加呈增加趨勢，結實率和韆粒重則相反。抽穗期和成熟期各器官的榦物質積纍、含氮量和植株氮素積纍量均隨施氮量的增加呈增加的趨勢。氮素生產效率、氮素吸收利用率、氮素農學利用率和氮素偏生產力4箇氮素利用效率指標均隨施氮量的增加呈下降的趨勢，以氮素生產效率和氮素偏生產力的下降較為明顯。
채용대전시험，연구료3개시담량처리대갱도적간물질적루、자립산량、산량구성인소급담비이용효솔적영향。결과표명：자립산량、유효수수화매수립수수시담량적증가정증가추세，결실솔화천립중칙상반。추수기화성숙기각기관적간물질적루、함담량화식주담소적루량균수시담량적증가정증가적추세。담소생산효솔、담소흡수이용솔、담소농학이용솔화담소편생산력4개담소이용효솔지표균수시담량적증가정하강적추세，이담소생산효솔화담소편생산력적하강교위명현。
Field experiments were adopted to study the impacts of three nitrogen fertilizer rates on dry matter accumulation, grain yield, yield components and nitrogen utilization efficiency of japonica rice. The results showed that grain yield, effective panicles and grain number per panicle of japonica rice increased along with increasing nitrogen fertilizer rate, but seed setting percentage and thousand-seed weight decreased. Dry matter accumulation and nitrogen content in each organ and nitrogen accumulation in plant of japonica rice all showed a increasing trend along with increase of nitrogen fertilizer rate in both heading period and mature period. The producing efficiency, absorption efficiency, agricultural utilization rate and partial productivity of nitrogen all decreased with increasing nitrogen fertilizer rate, among which the nitrogen producing efficiency and the nitrogen partial productivity declined more obvious.
