稻油复种免耕对超级杂交稻群体特性影响的研究

Influences of Rice-oilseed rap Multiple Cropping with Zero Tillage on Group Characteristics of Hybrid Rice

以超级杂交稻"云光14"为供试品种,于2010~2011年在稻免油免、稻免油翻、稻翻油免、稻翻油翻4种耕作方式下,研究了水稻群体质量特性。结果表明:免耕移栽稻在生育前期的干物质积累量为2 329.27 kg/hm2,比翻耕稻高14.6%;免耕移栽稻的叶面积指数在最高分蘖期和孕穗期均比翻耕高;免耕移栽稻的净同化率均比翻耕移栽稻略低,但差异不显著。免耕稻每穗粒数和结实率均低于翻耕,其中每穗粒数显著低于翻耕,而免耕稻的有效穗数高于翻耕稻。免耕移栽稻的平均产量为9 976.84 kg/hm2,翻耕稻的平均产量为10 041.76 kg/hm2,免耕稻的产量略比翻耕稻低0.6%,但差异不显著。

From 2010 to 2011,with the hybrid rice variety Yunguang-14 as the tested variety,the group characteristics of rice was studied with four tillage patterns,which are both rice and oilseed rape with zero tillage(RZ-OZ),rice with zero tillage and oilseed rape with conventional tillage(RZ-OC),rice with conventional tillage and oilseed rape with zero tillage(RC-OZ),and both rice and oilseed rape with conventional tillage(RC-OC).The results indicated that the dry matter accumulation in rice with ZT-RT was 2 329.27 kg/hm2,14.6% higher than that with CT-RT in the early growing stage;the leaf area index of rice with ZT-RT was higher than that with CT-RT in the maximum tiller stage and booting stage;the net assimilation rate of rice with ZT-RT was lower than that with CT-RT,but there was no significant difference between them;grains per panicle and seed setting rate of rice with ZT-RT were less than those with CT-RT,and the number of grain per panicle was significantly lower than that with CT-RT.The average yield of rice with ZT-RT was 9 976.84 kg/hm2 and that with CT-RT was 10 041.76 kg/hm2,the former was 0.6% lower than the latter,but the difference was not significant.