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研究了接种菌根菌(Glomus Intraradics)和/或根瘤菌(Bradyrhizobium Japonicum)对紫花苜蓿(Alfalfa)的生长及N、P的吸收效果。试验设4个处理[对照(CK);接种菌根菌(M);接种根瘤菌(R)及同时接种菌根菌和根瘤菌(M+R)],样品的分析是在紫花苜蓿的生长初期(播种后60 d)和开花初期(播种后120 d)分2次进行。随着作物的生长,在各处理区土壤总N量减少了,其中,M和M+R区的减少量相对比CK和R区显著,但作物的生长效果明显优于CK。在第120天进行的土壤有效P含量的分析中,M(65.5 mg/kg)和M+R(62.3mg/kg)区显著高于CK(39.1 mg/kg),而R(42.6 mg/kg)区没有明显变化。此时,在CK中作物的总N、P的吸收量分别为32.1和2.39mg/株,M、R和M+R区总N的吸收量比CK分别高20%、49%和50%,总P的吸收量比CK分别高28%、11%和45%。结果表明,接种菌根菌和/或根瘤菌显著提高作物吸收利用土壤中N、P的能力,以至提高其产量和质量。
The effects of inoculating mycorrhizas (Glomus Intraradics) and / or Bradyrhizobium Japonicum on the growth and N, P absorption of alfalfa were studied. Four treatments [CK (control), inoculation with mycorrhizal (M), inoculation with rhizobia (R) and simultaneous inoculation of mycorrhizal and Rhizobium (M + R) were carried out. The analysis of the samples was performed on alfalfa The initial stage (60 days after sowing) and the early stage of flowering (120 days after sowing) were carried out twice. With the growth of crops, the total amount of soil N decreased in all treatment areas. Among them, the decrease in M and M + R areas was more significant than that in CK and R areas, but the crop growth was obviously better than CK. In the analysis of soil available P content at day 120, the areas of M (65.5 mg / kg) and M + R (62.3 mg / kg) were significantly higher than those of CK (39.1 mg / kg) ) Area did not change significantly. At this time, the uptake of total N and P of crops in CK was 32.1 and 2.39 mg / plant respectively, and the uptake of total N in M, R and M + R zones was 20%, 49% and 50% higher than that of CK, respectively. Total P uptake was 28%, 11% and 45% higher than CK, respectively. The results showed that the inoculation of mycorrhizal fungi and / or Rhizobium could significantly improve the ability of crops to absorb and utilize N and P in soil, and improve their yield and quality.