Abstract: 【Objective】To explore the effects of different microbial agents on potato growth and development and soil nutrients in potato fields,so as to provide a reference for green and sustainable potato planting in Inner Mongolia.【Methods】Potato V7 was used as the test material,by setting distilled water (CK),applying Bacillus sp. 188 bacterial agent (T1),Pseudomonas sp. BP16 bacterial agent (T2),and Streptomyces rochei D74 bacterial agent (T3) four treatments to soak the seeds for 30 min. Potato yield,tuber starch content,dry matter mass of each organ,nutrient accumulation per plant,leaf chlorophyll content,nitrate reductase activity,soil ammonium nitrogen,nitrate nitrogen,available phosphorus and available potassium content were measured at different growth stages after potato planting.【Results】After 110 days of potato planting,compared with CK,the yield of potato in T2 and T3 treatments was significantly increased by 7.14% and 9.16% (P<0.05),the starch content of tubers was significantly increased by 11.84% and 16.38% (P<0.05),the dry matter mass of potato roots,stems,leaves,and tubers were significantly increased by 26.87%,16.92%,11.77% and 13.59% by T3 treatment (P<0.05),the accumulation of nitrogen,phosphorus and potassium in plants was significantly increased by 28.86%,32.78% and 30.81% by T3 treatment (P<0.05). After 70 days of potato planting,the chlorophyll content in potato leaves treated with T3 treatment was the highest [4.29 mg/ (g·FW)],and the nitrate reductase activity in the leaves was significantly increased by 15.29% compared to CK (P<0.05). After 50 days of potato planting,the soil nitrate nitrogen content in T3 treatment reached its maximum value (42.32 mg/kg),the available phosphorus content significantly increased by 26.17% compared to CK (P<0.05),and the available potassium content in T1 and T3 treatments significantly increased by 24.95% and 21.65% compared to CK (P<0.05),respectively.After 70 days of planting,the soil ammonium nitrogen content in T2 treatment significantly increased by 47.03% compared to CK (P<0.05).【Conclusion】Soaking seeds with Streptomyces rochei D74 microbial can increase potato yield,tuber starch content,dry matter mass of each organ,plant nitrogen,phosphorus and potassium accumulation,at agent tuber formation stage,the leaf chlorophyll content at maturation stage,soil nitrate nitrogen,available potassium,available potassium content at early growth stage,soil ammonium nitrogen at agent tuber formation stage. It can be used as a suitable microbial agent for potato cultivation in Inner Mongolia Autonomous Region. [ABSTRACT FROM AUTHOR]
Abstract: 【目的】 探究不同微生物菌剂浸种对马铃薯生长发育及薯田土壤养分的影响,为内蒙古自治区马铃薯绿色、可持续种植提供参考。【方法】 以马铃薯品种V7为试验材料,分别采用蒸馏水 (CK)、Bacillus sp. 188菌剂 (T1)、Pseudomonas sp. BP16菌剂 (T2)和Streptomyces rochei D74菌剂 (T3)浸种30 min,测定马铃薯种植后不同生长时期产量、块茎淀粉含量、各器官干物质量、单株养分积累量,叶片叶绿素含量、硝酸还原酶活性以及土壤铵态氮、硝态氮、速效磷和速效钾含量。【结果】 马铃薯种植后110 d,与CK相比,T2、T3处理马铃薯产量显著提高7.14%、9.16% (P<0.05),块茎淀粉含量显著提高11.84%、16.38% (P<0.05);T3处理马铃薯根、茎、叶、块茎干物质量显著增加26.87%、16.92%、11.77%、13.59% (P<0.05),氮素、磷素、钾素积累量显著提高28.86%、32.78%、30.81% (P<0.05)。种植后70 d,T3处理马铃薯叶片叶绿素含量最高[4.29 mg/ (g·FW)],叶片硝酸还原酶活性较CK显著提高15.29% (P<0.05)。马铃薯种植后50 d,T3处理土壤硝态氮含量达到最大值 (42.32 mg/kg),速效磷含量较CK显著提高26.17%, (P<0.05),T1、T3处理速效钾含量分别较CK显著提高24.95%、21.65% (P<0.05);种植后70 d,T2处理土壤铵态氮含量较CK显著提高47.03% (P<0.05)。【结论】 Streptomyces rochei D74菌剂浸种可提高成熟期马铃薯产量、块茎淀粉含量、各器官干物质量和植株氮素、磷素、钾素积累量以及块茎形成期叶片叶绿素含量,生育前期土壤硝态氮、速效磷和速效钾含量,块茎形成期土壤铵态氮含量,可作为内蒙古自治区马铃薯栽培较适宜施入的微生物菌剂。 [ABSTRACT FROM AUTHOR]
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