Effects of water and fertilizer control on soil phosphorus content of Panax notoginseng under micro-sprinkler irrigation
ZHENG Yang1,2, TUO Yunfei1*, YANG Cuiping1, WANG Qian1, WANG Zhaoyi1, XIANG Ping1, YANG Qiliang3
1. College of Ecology and Environment, Southwest Forestry University, Kunming, Yunnan 650224, China; 2. Sichuan Liziping National Nature Reserve, Shimian, Sichuan 625400, China; 3. College of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
Abstract：Through three orthogonal tests at water control levels and four at fertilizer control levels, an experimental study was carried out on the migration distribution and reserve characteristics of total phosphorus and available phosphorus under micro-sprinkler irrigation in Panicum under water control and fertilizer control in the typical planting area of Panicum in Dalishu Village, Luxi County, Yunnan province from 2017 to 2019. The results showed that the total phosphorus content with Panax notoginseng as the center of different irrigation amount decreased gradually in the horizontal direction and the increase of soil depth. The maximum value in the horizontal direction ranged from 0 to 10cm, and the maximum value in the soil depth ranged from 0 to 20 cm.The available phosphorus decreased first and then increased in the horizontal direction and soil depth, and the maximum appeared in the range of 0-20 cm in the horizontal direction and soil depth. With Panax notoginseng plants as the center, total phosphorus and available phosphorus at different fertilization rates decreased first and then increased in the horizontal direction and soil depth. The maximum value of total phosphorus and available phospho-rus in the horizontal direction and soil depth ranged from 0 to 10 cm. The distribution uniformity coefficients of total phosphorus and available phosphorus at different irrigation volumes decreased first and then increased with the increase of irrigation volume. The distribution uniformity coefficients of total phosphorus and available phosphorus at W3F2 treatment were the lowest, 46.77% and 62.70%, respectively; the skewness coefficients of total phosphorus at CK treatment were negative; the skewness coefficients of total phosphorus and available phosphorus at other treatments were positive.The distribution uniformity coefficients of total phosphorus and available phosphorus at different fertilizer rates decreased first and then increased with the increase of fertilizer rates. The distribution uniformity coefficient of total phosphorus at W2F3 treatment was the lowest, which was 46.83%, and that at W2F4 treatment was the lowest, which was 68.68%. The skewness coefficient of available phosphorus at W2F1 treatment was negative, and the skewness coefficients of total phosphorus and available phosphorus at other treatments were both positive.The reserves of total phosphorus and available phosphorus at different irrigation volumes were the largest at 0-20 cm on the surface of soil. The reserves of total phosphorus and available phosphorus decreased with the increase of soil depth and increased with the increase of irrigation volume. Total phosphorus and available phosphorus reserves at different fertilizer rates increased first and then decreased with the increase of fertilizer rates, and the average value of total phosphorus and available phosphorus reserves at W2F3 treatment was the highest.This study provided technical support for the efficient utilization and regulation of soil water and fertilizer in Panax notoginseng and had important guiding significance for the high-yield and high-quality cultivation of Panax notoginseng.
郑阳,脱云飞*,杨翠萍,王倩,王昭仪,向萍,杨启良. 控水控肥对微喷灌三七土壤磷素的影响[J]. 排灌机械工程学报, 2022, 40(6): 626-634.
ZHENG Yang,TUO Yunfei*,YANG Cuiping,WANG Qian,WANG Zhaoyi,XIANG Ping,YANG Qiliang. Effects of water and fertilizer control on soil phosphorus content of Panax notoginseng under micro-sprinkler irrigation. Journal of Drainage and Irrigation Machinery Engin, 2022, 40(6): 626-634.
