全周期间作模式胶园中间作大豆和玉米的生产力及其抗逆生理特性

通过观测光照、生物量和抗逆生理等指标,研究全周期间作模式胶园中间作大豆和玉米的生长和抗逆生理指标的特性变化。结果表明,全周期间作模式胶园中光照时长约为空旷地(单作)的18%~36%,对大豆和玉米的叶绿素含量、株高和茎粗存在不同程度的影响。间作处理大豆产量显著低于单作处理,为单作处理的60.2%(P0.05),而间作玉米则绝产。靠近橡胶树两边的作物产量和生物量低于宽行中间区域,其中宽行中间区域间作大豆产量为单作处理的77.0%~81.8%。除间作对大豆Pro含量有较显著影响外(P0.05),不同处理的大豆和玉米的抗逆生理总体不存在明显差异(P0.05)。综上所述,全周期间作模式胶园间作对大豆和玉米的生长特性影响较显著,而对其抗逆生理总体影响较小,大豆比玉米更适宜在全周期间作模式胶园中间作,且在宽行中间区域的产量较可观。

Productivity and physiology of stress tolerance of soybean and maize intercropping in rubber plantation with paired row planting system

Characteristic of growth and physiology of stress tolerance of soybean and maize intercropped in mature rubber plantation with paired row planting system (RPPRPS) were investigated by observing indicators of illumination and measuring biomass and physiological responses in stress tolerance.Results showed that duration of illumination in RPPRPS was only 18%-36% of open field.Content of chlorophyll,height and stem thickness of soybean and maize plants were affected to a certain degree.Yield of intercropped soybean was significantly reduced,which was 60.2% of monocultured soybean (P<0.05).There was no harvests of maize in intercropping treatment.The crop yield and biomass of plants adjacent to rubber tree were lower than those grew in the middle belt of wide row.Only 77.0%-81.8% of yield could be harvest in the middle belt for soybean compared to those in monocultured treatment.Despite the fact that the content of Pro in intercropped soybean was influenced significantly (P<0.05),there was no significant difference in physiology of soybean and maize plants during stress tolerance between treatments (P<0.05).In conclusion,the growth of soybean and maize rather than physiology of plant stress tolerance could be significantly affected in RPPRPS compared to monocultured treatments.Soybean was more suitable than maize to be planted as intercrop in RPPRPS,and considerable yield could be obtained in the middle belt.