| This paper studied the effect of microbial fertilizers on the pest resistance of tea plants.Three different fertilization treatments were set up.Three kinds of fertilizers,ie,microbial fertilizers,organic-inorganic compound fertilizers,and chemical fertilizers(CK),were applied to tea plants.The treated tea leaves were subjected to growth indicators and yield determination,biochemical composition determination,and field investigation of plant diseases and pests in the animal community.The contents of biochemical components,sensory evaluation,and mature leaves of two tea tree varieties No.12 and No.17 were comparatively analyzed.In three aspects of microstructure,the effects of these three fertilizers on tea plants and the compatibility and insect resistance of two different tea varieties were explored in order to provide reference for the green prevention and control of tea pests.The results of the study are as follows:(1)For the whole year,the density of tea buds treated with microbial fertilizer was838.5/m~2,which was significantly higher than the other two treatments 717.9/m~2 and721.6/m~2.With the extension of time,microbial fertilizers began to show its processing advantages after picking summer tea;there was a significant difference between the three treated autumn tea bud weights(P<0.05),which were 95.96 g,50.59 g and 43.4 g,respectively.;The total yield between the three treatments in the tea leaf yield indicator showed a significant difference.The effect of different fertilizer treatments on the total tea yield was improved.The microbial fertilizer treatment>the mixed fertilizer treatment>the chemical fertilizer treatment.The total output of microbial fertilizer treatment was 75.52 kg/667m~2,4.41%and 14.13%higher than the total output of compound fertilizer and chemical fertilizer treatment(CK),respectively;the mixed fertilizer treatment was 9.31%higher than the total output of chemical fertilizer treatment(CK).;(2)The biochemical indexes of fresh tea leaves harvested in each tea season were measured.The results showed that there was no significant difference in the content of water extracts between the treatments(P>0.05),but both the microbial fertilizer and the mixed fertilizer could be to a certain extent.With the increase of amino acid content,the amino acid content in the fourth tea season increased by 23.5%and 17.6%,respectively,and the tea polyphenol content decreased by 5.4%and 7.4%respectively.(3)In the investigation of field diseases and insect pests,there were 99 insects collected from the tea plantation community treated with microbial fertilizers,belonging to9 orders,24 families,and 25 species.There were 193 insects collected from the mixed tea plantation community,belonging to 10 orders.27 families and 31 species;chemical fertilizer treatment(CK)tea plant community collected a total of 232 insects,belonging to12 orders,26 families,30 species.The ecological environment of the animal community of tea tree treated with microbial fertilizer is more complex and more stable than that of the single animal system of chemical fertilizer(CK).The diversity of tea plantation species is closely related to its stability.The stronger the diversity,the better the balance of stability,and the less chance of pest outbreaks.(4)The study on the dynamics of the population of the green leafhoppers in different fertilization treatments showed that the population of the small green leafhopper showed two peaks of insect pests.Under different fertilizer treatments,with the passage of time,the microbial fertilizer and compound fertilizer at the peak of the pest in October The number of small green leafhoppers treated with chemical fertilizers was 0,11,and 19,respectively.The population of small green leafhoppers showed significant inhibitory effects under the effect of microbial fertilizers and compound fertilizers,among which the effect of microbial fertilizers was better.(5)The dynamic analysis of spider population dynamics by different fertilization treatments showed that the population of natural enemy spiders was positively correlated with the population of small green leafhoppers,and the population of natural enemy spiders fluctuates with the population size of small green leafhoppers.In the change,and in the peak season of small green leafhoppers in October,the numbers of microbes,mixed fertilizers,and chemical fertilizers were 4,4,and 5,respectively.The number of spiders was not significantly different among the three treatments.The impact on the number of arachnids is relatively small and has not been greatly affected.(6)By comparing the biological and physicochemical components of the two tea cultivars on the 12th and 17th tables of Taiwan,the differences in pest resistance of the two tea cultivars were compared,and there was significant difference in the content of water extracts and free amino acids between the two cultivars.difference.The water extract content of Taiwan No.12 and Taiwan No.17 were 40.8%and 44.1%,respectively,and the former was lower than the latter.The total amount of free amino acids at Taiwan No.12was 2.1%higher than 1.8%at Taiwan No.17.The two tea tree varieties No.12 and No.17 were made into green tea,white tea and black tea respectively.The results of the sensory evaluation were 96 and 94;92.5 and 93;92.5 and 94 respectively.For the three types of tea produced,the score of the Taiwan No.12 sensory evaluation was only higher than that of Taiwan No.17,indicating that Taiwan No.12 is more suitable for making black tea,while Taiwan No.17 made white tea and green tea have advantages.The results of leaf paraffin section showed that the thickness of the lower epidermis of No.12 and No.17 cultivars was 14.32?m and 16.32?m,respectively.The former was smaller than the latter,and there was a significant difference in the thickness of the lower epidermis,while Taiwan 12 was affected by insect infestation.On the 17th,the severe insect resistance was slightly weaker,and the thickness of the lower keratin was positively correlated with the degree of insect resistance. |
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