间作和双接种对玉米和菜豆生长的影响

为了验证菜豆玉米间作的可行性及双接种丛枝菌根真菌和根瘤菌在此间作体系中的影响。通过采用盆栽试验的方式,测定了不同栽培及接种方式下玉米和菜豆的一些生理指标如：生物量、氮磷钾元素的含量及吸收量、叶绿素SPAD值、菌根侵染率等。结果表明：单接种时,单作下的玉米和菜豆的总生物量分别是间作下的3.26倍和1.25倍;双接种时也分别达到了3.08倍和1.25倍。然而单接种时玉米和菜豆间作后每盆的吸氮量和吸磷量分别是间作下的1.11倍和1.05倍;双接种时则均为1.16倍。接种丛枝菌根真菌后玉米及菜豆的生物量、氮磷钾元素的含量及吸收量、叶绿素含量等差异均不显著,而菜豆的根瘤数却降低了。试验研究表明：间作抑制了菜豆及玉米的生长,但促进了二者对氮磷元素的吸收利用;接种丛枝菌根真菌对玉米及菜豆的生长无促进作用,对二者吸收利用氮磷钾元素也无明显促进,而且还抑制了根瘤菌侵染菜豆。

The Effects of Intercropping and Dual Inoculation on Maize and Common Bean (Phaseolus vulgaris) Growth

In order to estimate the feasibility of common bean（Phaseolus vulgaris）/maize intercropping applied on the actual production and the influence of dual inoculation（arbuscular mycorrhizal fungi and rhizobium） on them, by using pot experiment, some physiological indicators were measured under different cultivation methods and inoculation. The main physiological indicators were the beans and maize＇s biomass, the NPK content and absorption, chlorophyll SPAD value, mycorrhizal infection rate and other indicators. The results indicated that, when inoculated the rhizobia alone, the total biomass of maize and bean under the monoculture condition are respectively 3.26 times and 1.25 times higher than that under the intercropping condition; under the dual inoculation condition, the total biomass of maize and bean reached 3.08 times and 1.25 times. While for the nitrogen and phosphorus absorption of each pot, the crops under intercropping condition was respectively 1.11 times and 1.05 times higher than the monoculture condition when they all inoculated with rhizobia alone; and when dual inoculated, the absorption of nitrogen and phosphorus under the intercroppingcondition were both 1.16 times higher than the monoculture condition. There were no significant differences forthe biomass, content and uptake of NPK, chlorophyll content et al. when the crops were inoculated with arbuscular mycorrhizal fungi, but the number of nodules was decreased. Experimental studies showed that： the intercropping promoted the NP absorption to some extent. The mycorrhizal fungi had no role in promoting the growth of corn and bean and the uptake of NPK elements but also suppressed the rhizobium infect beans.