紫云英翻压量和沤田时间对覆膜水稻返青期植株的影响

Effects of the chinese milk vetch's amount and retting time in rice regreening plant by covered with plastic film

通过田间小区试验探讨紫云英翻压覆膜栽培对水稻植株的影响,紫云英最佳翻压量和覆膜前的安全沤田时间。紫云英鲜草异地翻压量分别为0、30 000、45 000、60 000 kg/hm2,紫云英翻压后7 d和14 d后覆膜移栽秧苗。结果表明,随着翻压量增加,成苗率、百株鲜重、叶龄、分蘖、株高等各项指标均呈降低趋势,在沤田期内稻田pH值比对照平均下降0.2～0.4个单位,有效铁含量是对照的2倍以上;当翻压量达到30 000、60 000 kg/hm2时,有效沤田时间不应少于7 d和14 d。

A field experiment was carried out to study the chinese milk vetch was returned to cultive rice,the amount of chinese milk vetch and safety retting time before covering with plastic film.The amount of chinese milk vetch returned in different place were 0,30 000,45 000,60 000 kg/hm2 respectively.After chinese milk vetch returning 7 and 14 days to transplanting seedlings.The results showed that with the increase of chinese milk vetch＇s amount,the rice seddling rate,fresh weight one hundred plant,leaf,tiller plant height etc index showed decreasing trend,the soil pH than the control decreased 0.2~0.4 units,the effective iron content was more than 2 times of control;When chinese milk vetch,s amount reached 30 000,60 000 kg/hm2,effective retting time should not be less than 7and 14 days.