Low pH is a major limiting factor for the production of black pepper (Piper nigrum L.) in Hainan province. Black pepper gardens often exhibit a decrease in soil pH (to 5.5 - 5.0) on orchards with a multi-year producti...Low pH is a major limiting factor for the production of black pepper (Piper nigrum L.) in Hainan province. Black pepper gardens often exhibit a decrease in soil pH (to 5.5 - 5.0) on orchards with a multi-year production history. An exploratory hydroponic experiment was conducted to examine the effects of increasingly acid nutrient solution pH (7.0, 5.5, 4.0, and 3.5) on seedling growth, tissue nutrient concentrations and root morphological traits. The results indicated that low pH may directly inhibit root development and function, limit K, Ca and Mg absorption and reduce seedling growth. At pH 5.5, black pepper attained maximum growth, while the minimum growth occurred at pH 3.5. It can be concluded that low pH reduces plant growth and is associated with low root nutrient concentrations of Ca and Mg, which may explain the decline of the yield in the seven pepper gardens of the Institute.展开更多
The Agricultural Science and Technology Experiment and Demonstration Park,as a unique tourist scenic spot,is a new model for the development of low-carbon leisure agriculture.In this paper,with Xinglong Tropical Botan...The Agricultural Science and Technology Experiment and Demonstration Park,as a unique tourist scenic spot,is a new model for the development of low-carbon leisure agriculture.In this paper,with Xinglong Tropical Botanical Park as a study case,the practice of developing a model of low-carbon agricultural science and technology tourism in the park is explored.Main measures for developing low-carbon leisure agriculture in Agricultural Science and Technology Experiment and Demonstration Park are summarized,including development of low carbon attractors,construction of low carbon facilities,strengthening low-carbon management,building low-carbon environment and so on,according to analysis on the models for development of low-carbon agricultural science tourism in this park.展开更多
文摘Low pH is a major limiting factor for the production of black pepper (Piper nigrum L.) in Hainan province. Black pepper gardens often exhibit a decrease in soil pH (to 5.5 - 5.0) on orchards with a multi-year production history. An exploratory hydroponic experiment was conducted to examine the effects of increasingly acid nutrient solution pH (7.0, 5.5, 4.0, and 3.5) on seedling growth, tissue nutrient concentrations and root morphological traits. The results indicated that low pH may directly inhibit root development and function, limit K, Ca and Mg absorption and reduce seedling growth. At pH 5.5, black pepper attained maximum growth, while the minimum growth occurred at pH 3.5. It can be concluded that low pH reduces plant growth and is associated with low root nutrient concentrations of Ca and Mg, which may explain the decline of the yield in the seven pepper gardens of the Institute.
基金Supported by Special Project for Spark Industrial Zone of Hainan Province(HNXH201104)
文摘The Agricultural Science and Technology Experiment and Demonstration Park,as a unique tourist scenic spot,is a new model for the development of low-carbon leisure agriculture.In this paper,with Xinglong Tropical Botanical Park as a study case,the practice of developing a model of low-carbon agricultural science and technology tourism in the park is explored.Main measures for developing low-carbon leisure agriculture in Agricultural Science and Technology Experiment and Demonstration Park are summarized,including development of low carbon attractors,construction of low carbon facilities,strengthening low-carbon management,building low-carbon environment and so on,according to analysis on the models for development of low-carbon agricultural science tourism in this park.
