Papers by Keyword: Tea Plantation

Abstract: The quality and safety of agricultural products is a concern for the entire world. The main focus is pesticide residues, which is especially typical in process of tea production. The technology of Using Light to Trap is the best way to solve the problem, because it is to induce and kill pests with physical means of light, electricity, color and etc. Over the past decade, pilot demonstration and applications of insecticidal lamps applied in tea plantation have been conducted in more than a dozen provinces all over China, which achieved remarkable results. This article aims to conduct the work of conclusion and analysis on the basis of test results from fields over the years and the work of comprehensive analysis and accession with the consideration of current development status of the technology of Using Light to Trap, and thus provides scientific basis for ecological control of pests and diseases in tea plantation, reduction on volume of chemical pesticides, decrease of pesticide residues in tea, maintenance of ecological balance and protection for agricultural ecological environment.

Abstract: For configuring wireless sensor networks system and node deployment in tea plantation, this paper researched propagation characteristics of 2.4 GHz wireless channel at different directions and heights in perennial tea plants. Received signal strength and packet loss numbers were obtained by field testing measurements at three directions and two heights. The results showed that different heights of sensor nodes in the tea plants determine the wireless channel propagation characteristics. But the impact of propagation directions on wireless signal is weaker. Besides, validation results show that it s best to deploy the sensor nodes antennas on the top of the tea canopy or above of it in the tea plantation. This research can provide technical support for WSN application in tea plantation.

Abstract: Soil aggregate stability as a key indicator of soil structure and erodibility to evaluate soil stability, is a product of interactions between soil environment, management practices, and land use patterns. The objective of this study was to analyze the distribution characteristics, characteristics of fractal features and stability of soil aggregates in tea plantations and eucalyptus plantations of Western Sichuan in China. The dry- and water-stable aggregate size distributions were determined by dry sieving and wet sieving methods. The results showed that soil structural properties in tea and eucalyptus plantations were similar. With increase in depth of soil layer, the aggregate stability of tea plantation soil became stronger. Comparative analysis of dry and wet sieving results showed that most of the aggregates in tea plantation soil were unstable. The soil aggregates >5mm and 0.5-0.25mm in size had higher stability, while those 2-1mm in size had lower stability. For tea plantation soil, the correlation coefficients between aggregate stability index and mean weight diameter, geometric mean diameter, fractal dimension were bigger under wet sieving than those under dry sieving. The results showed that aggregate stability index, mean weight diameter, geometric mean diameter, fractal dimension of water-stable aggregates could characterize soil aggregate stability in tea plantation ideally.