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为探索不同谷子品种耐低磷能力,以10个谷子品种为试验材料,设置不施磷(LP)与施P_2O_550kg/hm~2(CK)2个处理,研究低磷胁迫对不同谷子品种根、苗生长及根际土壤酶活性的影响和谷子对磷吸收的利用效率。结果表明,低磷较对照处理,根长增长-11.43%~28.57%(仅龙谷26降低),根系活力降低50.36%~73.14%,生物量降低6.29%~18.55%,根际土壤磷酸酶活性增长4.64%~19.97%,磷吸收量降低30.78%~37.14%,磷利用效率增长29.26%~37.38%,低磷对谷子根系性状的影响大于对地上部性状的影响。低磷胁迫下,不同谷子品种间生长及磷吸收利用的差异均较大,济谷13、济谷11的耐低磷能力相对较强,龙谷26的耐低磷能力较弱。
In order to explore the ability of low-phosphorus tolerance of different millet varieties, 10 millet varieties were used as test materials, and two treatments of phosphorus (LP) and applying P_2O_550kg / hm ~ 2 (CK) Seedling growth and rhizosphere soil enzyme activities and millet utilization efficiency of phosphorus uptake. The results showed that the root length increased from -11.43% to 28.57% (lower than that from Longgui 26), the root vigor decreased by 50.36% -73.14%, the biomass decreased by 6.29% -18.55%, the rhizosphere soil phosphatase activity Increased by 4.64% -19.97%, decreased phosphorus uptake by 30.78% -37.14%, increased phosphorus use efficiency by 29.26% -37.38%. The effect of low-phosphorus on the root traits of millet was greater than that on the shoot-top traits. Under low-phosphorus stress, the differences in growth and P uptake and utilization among different millet cultivars were large. The tolerance to low-phosphorus of Jigu 13 and Jigu 11 was relatively strong, while that of Longgu 26 was weaker.