摘要
种植方式是影响作物冠层内光照、温度、湿度和CO2等分布的重要因素。在大田条件下,研究了三种不同的种植方式(P1,宽窄行170 cm+30 cm;P2,宽窄行90 cm+40 cm;CK,匀垄65 cm)对灌浆期玉米冠层微环境的影响。试验结果表明,三种种植模式中,P2中光截获最高,P1中冠层光截获显著低于CK;三种模式间冠层温度差异显著:P1显著大于P2和CK,同时P2显著大于CK;相对湿度的趋势与温度相反,表现为P1<P2<CK;CO2浓度在50 cm高度上表现为P1<CK<P2,在50 cm以上高度,CK显著高于P2和P1,同时P2显著高于P1。结果表明,宽窄行种植模式中,有效辐射的分布更加均匀,对冠层中下部叶片的光合作用有促进作用;50 cm以上冠层温度、CO2浓度和相对湿度较低,可能会对光合作用有一定的抑制作用。
Under field condition, the effect of planting patterns on the microclimatic environment of corn canopy of two maize （Zea mays L. ） cultivars （Beiyu 288 and Xianyu 335） were examined in two planting patterns narrow-wide rows of （1） 170 cm ＋ 30 cm （P1, 6.4 plants/m2）; （2） 90 cm ＋ 40 cm （P2, 6.4 plants/m2）, and uniform row of 65 cm （control, i. e. CK, 6.4 plant/m2） was studied. The experiment results showed that, in three planting patterns, the total light interception in P1 was the lowest, but more incoming PAR was detected in middle-low strata in P1. In the contrary, the temperature of the canopy in P1 is higher than P2 and CK at every height strata while P2 was higher than CK. The relative humidity was depict as P1 〈 P2 〈 CK, the difference among these treatments were significant. The concentration of CO2 in P1 was significantly lower than CK, while the value in P2 was the highest in three planting patterns at 50 cm strata, and at upper 50 cm strata, the concentration of CO2 was the lowest in P1, and the highest in CK. These results indicate that narrow-wide planting pattern improves the light environment of canopy, creates more uniform CO2, temperature, and moistures circumstance.
出处
《干旱地区农业研究》
CSCD
北大核心
2012年第3期37-40,45,共5页
Agricultural Research in the Arid Areas
基金
中国科学院知识创新工程重要方向项目“玉米高产新型种植模式的规范化示范”(KSCX2-YW-N-077)
关键词
玉米
种植模式
宽窄行
微环境
maize（ zea mays. L）
planting pattern
narrow-wide row
microclimatic environment
