Anedo Emmanuel O, Beesigamukama Dennis, Mochoge Benson, Korir Nicholas K, Haukeland Solveig, Cheseto Xavier, Subramanian Sevgan, Kelemu Segenet, Tanga Chrysantus M
International Centre of Insect Physiology and Ecology, Nairobi, Kenya.
Department of Agricultural Science and Technology, Kenyatta University, Nairobi, Kenya.
Front Plant Sci. 2024 Feb 23;15:1343038. doi: 10.3389/fpls.2024.1343038. eCollection 2024.
Potato production faces major challenges from inadequate soil fertility, and nematode infestation, yet synthetic fertilizers and nematicides are costly and harmful to the environment. This study explored the potential of chitin-fortified black soldier fly-composted organic fertilizer (BSFCOF) as a multipurpose organic fertilizer amendment for enhancing potato yield and suppressing potato cyst nematodes (PCN). The BSFCOF was applied at a rate equivalent to 150 kg N ha and fortified with chitin from black soldier fly pupal exuviae at inclusion rates equivalent to 0.5, 1, 2, 3, 4 and 5% chitin. Data were collected on potato growth characteristics, PCN population densities, and soil chemical properties for two growing cycles. Results showed that chitin fortified BSFCOF significantly improved potato growth parameters, chlorophyll concentration, marketable tuber yield and number of marketable tubers. The marketable tuber yield achieved using chitin-fortified BSFCOF was 70 - 362%, and 69 - 238% higher than the values achieved using unfertilized soil during the first and second growing cycles, respectively. Soil amendment with chitin-fortified BSFCOF significantly reduced the number of cysts per 200 g soil, number of eggs and J2 per cyst, eggs g soil and reproduction rate by 32 - 87%, 9 - 92%, 31- 98% and 31 - 98%, respectively. The PCN suppression increased with chitin inclusion rates. There were significantly higher values for soil pH, ammonium nitrogen, nitrate nitrogen, available phosphorus, calcium, magnesium, potassium, and cation exchange capacity in soil amended with BSFCOF compared to unamended soil. This study demonstrates that BSFCOF fortified with 5% chitin is an effective soil enhancer with multiple benefits, including improved soil fertility, potato performance, and effective management of potato cyst nematodes.
马铃薯生产面临着土壤肥力不足和线虫侵染等重大挑战，然而合成肥料和杀线虫剂成本高昂且对环境有害。本研究探讨了几丁质强化的黑水虻堆肥有机肥（BSFCOF）作为一种多功能有机肥料改良剂，用于提高马铃薯产量和抑制马铃薯胞囊线虫（PCN）的潜力。BSFCOF的施用量相当于150 kg N/ha，并添加了来自黑水虻蛹壳的几丁质，添加比例相当于0.5%、1%、2%、3%、4%和5%的几丁质。在两个生长周期内收集了马铃薯生长特性、PCN种群密度和土壤化学性质的数据。结果表明，几丁质强化的BSFCOF显著改善了马铃薯的生长参数、叶绿素浓度、可销售块茎产量和可销售块茎数量。在第一个和第二个生长周期中，使用几丁质强化的BSFCOF获得的可销售块茎产量分别比未施肥土壤高出70%-362%和69%-238%。用几丁质强化的BSFCOF改良土壤显著降低了每200 g土壤中的胞囊数量、每个胞囊中的卵和J2数量、每克土壤中的卵数量以及繁殖率，分别降低了32%-87%、9%-92%、31%-98%和31%-98%。PCN抑制作用随着几丁质添加比例的增加而增强。与未改良土壤相比，用BSFCOF改良的土壤中土壤pH值、铵态氮、硝态氮、有效磷、钙、镁、钾和阳离子交换容量的值显著更高。本研究表明，添加5%几丁质的BSFCOF是一种有效的土壤改良剂，具有多种益处，包括提高土壤肥力、改善马铃薯生长表现以及有效防治马铃薯胞囊线虫。
