摘要
通过测坑试验研究花荚期油菜在淹水条件下产量要素的变化。结果表明油菜相对产量与涝渍综合水深SFEW30呈显著负相关(R2=0.979 8)。减产幅度随着淹水天数的增加而增加,淹水直接导致油菜角果数减少、千粒重和产量降低等变化,对油菜株高和有效分枝数影响不大,在供试土壤为马肝土的条件下甘蓝型油菜耐淹天数为5天左右。为了不致造成较大减产,油菜花荚期的涝渍综合水深SFEW30应控制在65 cm.d左右。
In rape flower-pods stage,test-pit experiments were conducted to study yield factor changes under waterlogged condition.The results indicated that the relative yield of rape had a significant negative correlation with integrated waterlogging depth SFEW30（R2=0.979 8）.the range of yield reduction increases with increasing flooding duration,waterlogging leads to decrease of effective pod number,1000-grain weight decreasing and yield reduction while waterlogging has little effect on plant height and effective branch.The rape（Brassica.napus L） tolerance of flooding is about 5 days in the Experimental soil.To avoid great yield reduction of rape,the value of SFEW30 in rape flower-pods stage should be contro11ed about 65 cm·d.
出处
《中国农村水利水电》
北大核心
2010年第8期83-84,90,共3页
China Rural Water and Hydropower
基金
水利部公益性行业科研专项经费项目(200801044)
关键词
涝渍综合水深
油菜
花荚期
试验研究
淹水
integrated waterlogging depth
rap
flower-pods stage
experimental study
flooding
