Effects of soil relative water content on growth and seed setting of different varieties of green and bamboo-leaf Zanthoxylum

Analysis of soil relative water content in different varieties of Zanthoxylum schinifolium Siebold&Zucc. And Zanthoxylum armatum DC. The effects of growth and fruit bearing on Zanthoxylum provided theoretical basis for efficient cultivation of Zanthoxylum. Three 5-year green Zanthoxylum zanthoxylum cultivars ‘ Yunlin No. 2 ’,‘ Lalong No. 2 ’ and bamboo Zanthoxylum cultivars ‘ Liqing No. 2 ’ were used as test materials, and 4 kinds of soil relative water content were set up by drip irrigation: 75% ~ 80% (W1 treatment), 55% ~ 60% (W2 treatment), 40% ~ 45% (W3 treatment), 30% ~ 35% (W4 treatment), the effects of soil relative water content on the growth, physiology and fruit indexes of 3 Zanthoxylum cultivars were investigated. The results showed that there were significant differences in the growth, physiology and fruit indexes of the three varieties of Zanthoxanthium in different soil with different relative water content (P < 0.01). Among the 4 treatments, the growth indexes (average number of roots, average ground diameter, average shoot length), physiological indexes (average relative water content of leaves, average relative water content of fresh fruit) and outcome indexes (average fruit diameter, average fruit weight per 100 grains, average fruit yield per plant) of 3 Zanthus pepper varieties were in the order of W2 > W1 > W3 > W4. When the soil relative water content was 55%-60% (W2), the growth, physiological and fruit indexes of ‘ Yunlin No. 2’, ‘ Lalong No. 2’ and ‘ Liqing No. 2 ’ of bamboo Zanthoxylum were significantly higher than those of W1 treatment by 75%-80%, W3 treatment by 40%-45 and W4 treatment by 30%-35%. In addition, in the soil with the same water content, the local excellent clonal variety ‘ Liqing No. 2 ’ had better root growth and stronger shoot germination. Therefore, in the cultivation of Zanthoxylum, 55% ~ 60% of the field water capacity can be selected in the field management of water-controlled irrigation, and promote the best varieties suitable for local planting.