PDF(Pubmed)
Abstract：
Soil degradation has been accelerated by the use of chemical pesticides and poor agricultural practices, which has had an impact on crop productivity. Recently, there has been a lot of interest in the use of eco-friendly biochar applications to enhance soil quality and sequester carbon in sustainable agriculture. This study aimed to determine the individual and combined effects of Leaf Waste Biochar (LWB) and the bio-control agent Trichoderma harzianum (BCA) on the development of bacterial wilt in eggplants (Solanum melongena) caused by Ralstonia solanacearum (RS). The effects of LWB and BCA on eggplant physiology and defense-related biochemistry were comprehensively examined. Inoculated (+RS) and un-inoculated (-RS) eggplants were grown in potting mixtures containing 3% and 6% (v/v) LWB, both with and without BCA. The percentage disease index was considerably reduced (90%) in plants grown in the 6% LWB+ BCA amended treatments. Moreover, the plants grown in LWB and inoculated with BCA had higher phenolics, flavonoids and peroxidase contents compared to the non-amended control. The level of NPK was significantly increased (92.74% N, 76.47% P, 53.73% K) in the eggplants cultivated in the 6% LWB + BCA composition. This study has shown that the association of T. harzianum with biochar improved plant growth and reduced R. solanacearum induced wilt. Furthermore, the combined impact of biochar and T. harzianum was greater in terms of wilt suppression and increase in plant physiological measurements when the biochar concentration was 6%. Biochar and bio-control agents triggered biochemical alterations, thus enhancing the management of disease-infested soils.
摘要：
使用化学农药和不良的农业做法加速了土壤退化，这对作物生产力产生了影响。最近,在可持续农业中，人们对使用生态友好型生物炭来提高土壤质量和固碳的兴趣很大。本研究旨在确定叶废物生物炭（LWB）和生物防治剂哈茨木霉（BCA）对茄子（Solanummelongena）引起的青枯病的发展的单独和联合作用。综合考察了LWB和BCA对茄子生理和防御相关生化的影响。接种的（RS）和未接种的（-RS）茄子在含有3％和6％（v/v）LWB的盆栽混合物中生长，有和没有BCA。在6%LWB+BCA修正处理中生长的植物中,疾病指数百分比显著降低(90%)。此外，在LWB中生长并接种BCA的植物具有较高的酚类，与未改良对照相比，类黄酮和过氧化物酶含量。NPK水平显著提高(92.74%N,76.47%P，53.73%K)在6%LWB+BCA组成中栽培的茄子中。这项研究表明，哈茨木霉与生物炭的结合改善了植物的生长，并减少了青枯菌引起的枯萎病。此外，当生物炭浓度为6％时，生物炭和哈茨木霉在抑制枯萎和增加植物生理测量方面的综合影响更大。生物炭和生物防治剂引发了生化改变，从而加强对病害土壤的管理。
