| 【Objective】Focusing on the main line of“zero growth of chemical fertilizer”and“quality and
performance improvement and green development”for tea industry, the study aimed to integrate an applicable applicationtechnology of saving and improving efficiency of chemical fertilizer in tea garden.【Method】Based on high-efficiency
fertilization technologies such as soil testing and formula recommendation, organic fertilizer replacing chemical fertilizer and
fertigation, three location experiments and fourteen monitoring points were established in the representative tea gardens of
Dabu County. According to the experiment and monitoring results, the technology model of saving and improving efficiency of
chemical fertilizers for tea garden was integrated and promoted through training and demonstration.【Result】Result of the
three location experiments showed that the soil quality was improved, the organic matter was increased by 0.3-2.0 g/kg; the
soil acidification was alleviated and pH was increased by 0.02-0.18. The yield of tea green was increased by 5.2%-17.1% and
the quality was improved, with the planting benefit increased by 3 960-16 110 yuan/hm2. Result of monitoring points showed
that the heavy metal contents of tea garden soils were in line with the first-class national environmental standard, and the
heavy metal contents of tea leaves were all up to the national safety standard. Through technical demonstration and observation
training, the farmers’concept of fertilization was changed, and the fertilization technology level was improved. The organic
fertilizer consumption increased by 895.5 kg/hm2 while the chemical fertilizer consumption decreased by 184.5 kg/hm2 in tea
garden. The chemical fertilizer consumption of Dabu county in 2018 decreased by 1 676, 8.0% reduced compared with that in 2017,
and the goal of“zero growth of chemical fertilizer”in Dabu tea garden was preliminarily achieved. More than 20 tea brands were
cultivated and 330 hm2 of fertigation tea garden were built, and the comprehensive competitiveness of the tea industry was significantly
improved.【Conclusion】The“chemical fertilizer saving and efficiency improving technology”based on soil testing and formula
recommendation, organic fertilizer substitution and fertigation can effectively reduce the consumption of chemical fertilizer, increase
yield and quality of tea, and provide important support for promoting green and efficient tea cultivation, prosperity of tea industry and
revitalization of rural areas. |
