Using a chlorophyll meter to estimate tea leaf chlorophyll and nitrogen contents
| العنوان: | Using a chlorophyll meter to estimate tea leaf chlorophyll and nitrogen contents |
|---|---|
| المؤلفون: | J.P Yang, Z.A Liu, Zaixing Yang |
| المصدر: | Journal of soil science and plant nutrition v.12 n.2 2012 SciELO Chile CONICYT Chile instacron:CONICYT Journal of soil science and plant nutrition, Volume: 12, Issue: 2, Pages: 339-348, Published: 2012 |
| بيانات النشر: | Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo, 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Chlorophyll content, chlorophyll indicator, nitrogen nutrition, Soil Science, chemistry.chemical_element, food and beverages, Plant Science, Nitrogen, Chlorophyll meter, chemistry.chemical_compound, tea leaves, Human fertilization, Nitrogen fertilizer, chemistry, Agronomy, SPAD reading, Chlorophyll, nitrogen partitioning, Camellia sinensis, Agronomy and Crop Science, Tea leaf |
| الوصف: | A chlorophyll meter can conveniently estimate foliar chlorophyll and nitrogen (N) contents in many species. The objective of this study was to evaluate the utility of a chlorophyll meter to inform nitrogen fertilization rates of tea (Camellia sinensis L.) at different places and times. Plot-scale (5 x 20 m) experiments with three replications were conducted in 2010. Each plot was treated with 248 kg pure N ha-1 per year as urea. At the same time, a field-scale (32 ha) experiment, with the same fertilization rate, was conducted at the same plantation. Tea leaves were sampled in August and November and analyzed with a chlorophyll meter in situ and in the lab. The chlorophyll and nitrogen contents and chlorophyll meter (SPAD) readings of tea leaves in August were greater than in November, and plot-scale values were greater than field-scale values. SPAD readings could estimate the chlorophyll content of tea leaves regardless of temporal and spatial considerations. However, space and time must be considered when using SPAD readings to estimate the nitrogen content of tea leaves. |
| وصف الملف: | text/html |
| اللغة: | English |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39e0aba71e440047e0c75838f994b66cTest http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162012000200013Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....39e0aba71e440047e0c75838f994b66c |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |