Effect of foliage spraying of zinc, boron, manganese fertilizers on the accumulation and distribution of dry matter in Lilium davidii var. unicolor

The accumulation and distribution of dry matter and bulb yield in Lilium davidii var. unicolor was determined under foliage spraying of trace elements zinc, boron and manganese in hilly cropland. The results show that suitable concentrations of zinc, boron and manganese improve the accumulation and distribution efficiency of dry matter in L. davidii var. unicolor and also increase bulb yield. The most significant dry matter accumulation efficiency occurs at 200 mg·L^-1 zinc, boron and manganese, which presents an increase of 26.5%, 31.8% and 23.6% respectively compared with CK. Zinc and boron are conducive for the transfer and distribution of photosynthetic products to bulbs. At a concentration of 200 mg·L^-1 zinc and boron, the ratio of bulb to total dry matter at harvest increases by 4.16% and 2.44% respectively compared with CK. When manganese is applied alone, the ratio of bulb to total dry matter is less than that of CK. Decreasing range is positively correlated with spraying concentration. Treatments of 200 mg·L^-1 zinc and boron, and 100 mg·L^-1 manganese significantly enhance bulb yield.