Čepulienė Rita, Butkevičienė Lina Marija, Skinulienė Lina, Steponavičienė Vaida
Department of Agroecosystems and Soil Sciences, Vytautas Magnus University, K. Donelaičio Street 58, 44248 Kaunas, Lithuania.
Plants (Basel). 2022 Dec 10;11(24):3464. doi: 10.3390/plants11243464.
As the consumption of plant products grown under regulated-climate conditions intensifies, its production also intensifies. Peat substrate as a growing medium is widely used due to its desirable physical, chemical, and biological properties. Peatlands play an important ecological, economic, and cultural role in human well-being, but their resources are decreasing, so wood fiber can be used as a substitute for peat substrate. Cucumbers ( L.) were cultivated in growing media (Factor A) of peat substrate and wood fiber: (1) peat substrate (PS); (2) wood fiber (WF); (3) WF and PS 50:50 /; or (4) WF and PS 25:75 /. To evaluate the amount of additional nitrogen, four fertilization rates were used (Factor B): (1) conventional fertilization (CF); (2) N; (3) N; or (4) N. The yield of cucumbers grown in wood fiber depended on the amount of additional nitrogen. When plants were fertilized with the highest rate of additional nitrogen, N, their yield increased by 22% compared to the yield of cucumbers that were grown in wood fiber using conventional fertilization. Chlorophyll synthesis was the most intense in the leaves of cucumbers grown in wood fiber when the plants were additionally fertilized with N and N and in mixtures of wood fiber with peat substrate in ratios of 50:50 and 25:75, fertilized with N and N, respectively. In summary, it can be argued that cucumbers can be grown in wood fiber and in a mixture with peat substrate in a ratio of 50:50, but additional nitrogen is needed to compensate for the amount of nitrogen immobilized in the fiber.
随着在可控气候条件下种植的植物产品消费量的增加，其产量也随之提高。泥炭基质作为一种生长介质，因其理想的物理、化学和生物学特性而被广泛使用。泥炭地在人类福祉方面发挥着重要的生态、经济和文化作用，但其资源正在减少，因此木纤维可作为泥炭基质的替代品。在泥炭基质和木纤维的生长介质（因素A）中种植黄瓜（L.）：（1）泥炭基质（PS）；（2）木纤维（WF）；（3）WF和PS 50:50 /；或（4）WF和PS 25:75 /。为了评估额外氮素的用量，使用了四种施肥量（因素B）：（1）常规施肥（CF）；（2）N；（3）N；或（4）N。在木纤维中种植的黄瓜产量取决于额外氮素的用量。当植株以最高额外氮素用量N施肥时，其产量比在木纤维中采用常规施肥种植的黄瓜产量提高了22%。当植株额外施用N和N，以及在木纤维与泥炭基质比例为50:50和25:75的混合物中分别施用N和N时，木纤维中种植的黄瓜叶片叶绿素合成最为强烈。总之，可以认为黄瓜可以在木纤维以及与泥炭基质比例为50:50的混合物中生长，但需要额外的氮素来补偿纤维中固定的氮量。
