木霉生物有机肥应用于滨海盐土甘蓝种植的生物效应
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S144.1

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国家重点研发计划项目(2016YFD0800605)、江苏省自然科学基金项目(BK20180533)和大学生创新创业训练专项计划项目(S20190038)共同资助


Biological Effect of Trichoderma-enriched Biofertilizers on Cabbage Cultivation in Coastal Saline Soil
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Supported by the National Key Research and Development Program of China (No. 2016YFD0800605), the Natural Science Foundation of Jiangsu Province of China (No. BK20180533) and the College Students

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    摘要:

    本文旨在研究滨海盐土种植体系下,2种木霉生物有机肥与不同比例化肥配施对甘蓝产量、结球品质及土壤理化性质的影响。以甘蓝(Brassica oleracea L.)“绿宝石”为试验材料,分别设置田间试验和盆栽试验,设计8个处理:不施肥对照(CON)、100%化肥(CF)、30%的木霉生物有机肥+70%化肥、60%的木霉生物有机肥+40%化肥、100%的木霉生物有机肥(无化肥),其中木霉生物有机肥分2种,分别由贵州木霉T.guizhouense NJAU 4742和滩涂木霉T.arenarium 1A131菌株制成。施肥处理间总氮、总磷和总钾养分均等。盆栽和田间试验结果均表明,60%木霉生物有机肥+40%的化肥处理,相比于CON和CF处理可显著提高甘蓝的地上部鲜物质量、叶绿素含量(SPAD值)和根系生物量,且30%和60%生物有机肥配施化肥的处理均显著提高了土壤硝态氮和有效磷含量(P <0.05)。同时,田间试验表明,相对于其他处理,60%的木霉生物有机肥+40%化肥处理对甘蓝产量的提高和结球品质的改善(还原糖、维生素C含量提高,硝酸盐含量降低)效果最为显著(P<0.05)。综上,在滨海盐土甘蓝种植体系中,60%的木霉生物有机肥与40%化肥配施为最优配比。该施肥模式下,甘蓝根系生长发育最佳;且与通过施肥引入的养分相比,功能菌木霉在该生物效应中发挥更为重要的作用。

    Abstract:

    [Objective] The area of coastal saline soil is recognized as an important land resource with utilization value for agriculture. However, coastal mudflat area is usually characterized by poor plant growth and low microbial activity due to its high salinity suppressing most crops via the high osmotic stress, nutrient deficiency, toxicity and poor physical soil conditions. Soil microbes like Trichoderma spp. play a significant role in assisting plants to tolerate salinity stress. The present study aimed to investigate the effect of two Trichoderma-enriched bio-organic fertilizers on the yield and quality of cabbages (Brassica oleracea L.) grown in coastal saline soil as well as their effect on soil nutrient availabilities.[Method] Field and pot experiments were carried out with eight treatments:100% chemical fertilizer (CF), 30% bio-organic fertilizer plus 70% chemical fertilizer, 60% bio-organic fertilizer plus 40% chemical fertilizer, 100% bio-organic fertilizer (without chemical fertilizers), and using the non-fertilization treatment as the control (CON). The two bio-organic fertilizers were respectively prepared with strains of Trichoderma guizhouense NJAU 4742 (which is commercially available in China as a plant-growth-promoting agent) and T. arenarium 1A131 (which was previously isolated from saline mudflat of Dafeng, Jiangsu). The nutrient load of the seven fertilization treatments was set up to equal in the aspect of the contents of total N, P and K.[Result] Results obtained from both the field and pot experiments demonstrated that there was no significant difference in the effect of the two bio-organic fertilizers. Compared to the non-fertilized control (CON) and the full chemical fertilization (CF), 30% or 60% bio-organic fertilizer significantly increased the contents of nitrate N and available P in soil. The treatment of 60% bio-organic fertilizer plus 40% chemical fertilizer influenced the cabbage growth by significantly (P< 0.05) promoting the biomass of shoot and roots, and the chlorophyll content (shown by the SPAD values) in leaves. Among the fertilization treatments, application of 60% bio-organic fertilizer plus 40% chemical fertilizer resulted in the significantly highest yield and best quality of cabbage heads (with increased sugar and vitamin C contents, and less nitrate accumulation, P < 0.05). Moreover, principal component analysis (PCA) demonstrated that the significantly better plant growth effect did not correspond to the variation of soil nutrients. Rather, it may be related to the loaded microbes which were previously reported to be able to promote plant growth via producing phytohormones and activating the local microbiome.[Conclusion] Application of 60% bio-organic fertilizer combined with 40% chemical fertilizer, which allows the roots to develop to the maximum in such a saline ecosystem, is the optimized fertilization regime to cultivate cabbages in saline agriculture in coastal mud flats. Besides, compared to the nutrient load from the fertilizers, the function of the Trichoderma strains was found to be more directly linked to the plant-beneficial effect of this fertilization regime. The biological effect from the applied strains did not significantly rely on the origination of a specific strain. Moreover, the requirement of applying a local saline soil strain to the saline agriculture was not fully addressed here at least not in this study, and thus, needs further investigations.

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于亚楠,邬海燕,王盼星,丁明月,马行聪,姜斯琪,蔡枫,沈其荣,陈巍.木霉生物有机肥应用于滨海盐土甘蓝种植的生物效应[J].土壤学报,2022,59(4):1112-1124. DOI:10.11766/trxb202009100511 YU Ya'nan, WU Haiyan, WANG Panxing, DING Mingyue, MA Xingcong, JIANG Siqi, CAI Feng, SHEN Qirong, CHEN Wei. Biological Effect of Trichoderma-enriched Biofertilizers on Cabbage Cultivation in Coastal Saline Soil[J]. Acta Pedologica Sinica,2022,59(4):1112-1124.

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