Department of Zoology, Guru Nanak Dev University, Punjab, 143005, India.
Sci Rep. 2019 Feb 4;9(1):1341. doi: 10.1038/s41598-018-37880-1.
In the present study rice straw (R, control) was mixed with Cowdung (C), Azolla (A) and cellulolytic fungus Aspergillus terreus (F) in different combinations viz. RC, RA, RF, RCF, RCA, RFA and RCFA and subjected to aerobic composting (Acom) and vermicomposting (Vcom - with Eisenia fetida). It was found that addition of azolla and cattledung to two parts straw(RCA-666: 314:20 g) caused fastest degradation (105 days), gave maximum population buildup of E. fetida (cocoons, hatchlings and worm biomass), highest decline in pH, EC, TOC and C/N ratio and maximum increase over control in N(17.72%), P(44.64%), K(43.17%), H (7.93%), S (14.85%), Ca(10.16%), Na(145.97%), Fe(68.56%), Zn(12.10%) and Cu(32.24%). Rice straw (R) took longest time for degradation i.e. 120 and 140 days and had lowest content of nutrients in Vcom as well as Acom group. RCFA was also converted into Vcom at the same time but other parameters were less than RCA except for highest content of B (19.87%), Mg(21.27%) and Mn (5.58%). Bioconversion of three parts straw (RCA-735:245:20 g) was also faster (110 days) with vermicomposting than all the mixtures of Acom group (130-140 days) but nutrient content was slightly less than RCA with 2 parts straw. The results show that azolla reduces dependence on cattledung for recycling the carbon rich rice straw and enhances its agronomic value.
在本研究中，将稻草（R，对照）与牛粪（C）、满江红（A）和纤维素分解真菌 Aspergillus terreus（F）以不同的组合混合，即 RC、RA、RF、RCF、RCA、RFA 和 RCFA，并进行好氧堆肥（Acom）和蚯蚓堆肥（Vcom-用赤子爱胜蚓）。结果发现，向两份稻草（RCA-666：314：20 g）中添加满江红和牛粪可导致最快的降解（105 天），赤子爱胜蚓的种群增长最快（茧、孵化幼虫和蚯蚓生物量），pH 值、EC 值、TOC 和 C/N 比下降最快，与对照相比，N（17.72%）、P（44.64%）、K（43.17%）、H（7.93%）、S（14.85%）、Ca（10.16%）、Na（145.97%）、Fe（68.56%）、Zn（12.10%）和 Cu（32.24%）的含量最高。稻草（R）的降解时间最长，即 120 天和 140 天，Vcom 和 Acom 组的养分含量最低。RCFA 也在同一时间转化为 Vcom，但除了 B（19.87%）、Mg（21.27%）和 Mn（5.58%）含量最高外，其他参数均低于 RCA。三份稻草（RCA-735：245：20 g）的生物转化也比 Acom 组的所有混合物（130-140 天）更快（110 天），但养分含量略低于 RCA 的两份稻草。结果表明，满江红减少了对牛粪的依赖，实现了富碳稻草的再循环，提高了其农业价值。
