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- Title
不同施肥和灌溉水平对三七生长特性和发病率的影响.
- Authors
刘艳伟; 周潇; 杨启良; 茶品元
- Abstract
In order to explore the irrigation and fertilization mode which was conducive to the growth and development of Panax notoginseng and reduce the incidence of disease. Taking 3-year-old P. notoginseng as material, the field experiment was adopted, and the experiment set a total of three irrigation levels: W1 (low water, 0.5FC, FC was field water holding capacity), W2 (medium water, 0.7FC), W3 (high water, 0.9FC), and four fertilization levels: F1, F2, F3, F4, the annual fertilization amount was 96 kg·667m-2, the fertilization ratios of root weight gaining stage: seedling stage: flowering stage: fruiting stage were 25%:25%:25%:25%, 20%:25%:30%:25%, 15%:30%:30%:25% and 10%:40%:20%:30%, respectively. Effects of different fertilizer rates during the growth period and irrigation coupling on the growth characteristics, photosynthetic characteristics, dry matter accumulation and incidence of P. notoginseng were analyzed. The results showed that fresh weight and dry weight of the above-ground part, fresh weight and dry weight of roots, plant height and stem thickness in the seedling and fruiting stages in W2F4 treatment were the largest. The largest increase in stem thickness was W1F3 and W2F3 treatments, and the largest increase in plant height was W2F3 and W2F4 treatments. Net photosynthetic rate (Pn), leaf instantaneous water use efficiency (WUE) and light energy use efficiency in the flowering stage of P. notoginseng were higher than those in the fruiting stage. W2F4 and W2F3 treatments had low incidence in June, July and August. In summary, it could be seen that proper water stress and fertilizer increase in seedling and fruit stage were beneficial to increase the yield of Panax notoginseng and reduce the incidence of disease.
- Publication
Acta Agriculturae Zhejiangensis, 2021, Vol 33, Issue 8, p1426
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.2021.08.10