Effects of phosphate-solubilizing bacteria on rhizosphere microorganism and enzyme activities of lettuce

doi:10.14088/j.cnki.issn0439-8114.2019.11.016

Abstract

Abstract: A potting experiment was conducted to evaluate the effects of the phosphate-solubilizing bacteria on rhizosphere soil microorganism and enzyme activities at different growth stages of lettuce（Lactuca sativa var. ramosa Hort.） under four application levels of calcium-superphosphate. The results showed that the microorganism quantity and enzyme activity were regular change with growth periods of lettuce, they were reached a maximum in the rosette stage and declined in the harvest time, the least was the seedling stage. The effects on rhizosphere bacteria and actinomycetes, and enzyme activities increased progressively with application levels of calcium-superphosphate during the same period, which was the best under 0.060 g/kg application levels of calcium-superphosphate. However, it had no stimulative effect when the application level of calcium-superphosphate was 0.120 g/kg. On the contrary, the number of soil fungi had a reverse rule. So the appropriate phosphate and phosphate-solubilizing bacteria application with the lettuce microorganism quantity and enzyme activity were positive effect, and created a good micro-ecolobical environment for the growth of lettuce.

Key words: phosphate-solubilizing bacteria, rhizosphere soil microorganism, enzyme activity, lettuce（Lactuca sativa var. ramosa Hort.）

CLC Number:

S636.2

DU Lei, CHEN Gang, WANG Su-ping, HONG Juan, HUANG Xiang, ZHANG Li-hong, YE Li-xia, ZHANG Gui-you, LIAN Zhi-cheng. Effects of phosphate-solubilizing bacteria on rhizosphere microorganism and enzyme activities of lettuce[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(11): 70-74.

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