The Effect Of Molybdenum On Root Physiology Of Rape And Two Winter Wheat Cultivars

Based on the reviews of molybdenum nutrition, this experiment was conduct to study the root morphology and physiology of rape and two winter wheat cultivars.The results were as following.1. Molybdenum deficiency led to the seed weight of rape and two winter wheat cultivars declined significantly, at the same time, the biomass, stem height, ears, ears weight and kernal decreased distinctly. The two winter wheat cultivars had no obvious difference.2. Mo deficiency enhanced nitrate content, raise soluble protein and free ammonium content in root and shoot. But there have different variation for the rape and two winter wheat cultivars.3. The roots were affected by molybdenum deficiency, the root elongation and seminal root development of rape was restarded. For 97003, Molybdenum deficiency accelerated the growth of root and the number of seminal root, but did not affect those of cultivar 97014.4. At tilling and elongation stages, Molybdenum enhanced the root absorbtion area, active absorbtion area and root volume. But there have no obvious difference between the two winter wheat cultivars.5. The other root parameters of the both cultivars were influenced by molybdenum deficiency. The dry weight of root and shoot, the rate of root dry weight/shoot were also be affected by molybdenum. But 97014 was more sensitive than 97003.6. For rape and two winter wheat cultivars, the root exudation was differently affected by molybdenum. The content of protein was very low in the root exudation, there had no apparent among rape and two winter wheat cultivars. Under Mo-deficiency, the total amount and the kinds of Hydrolysis amino acids in rape and 97014 exudation were less than normal treatment, but there had remarkable difference for 97003 between two treatments (CK and Mo).7. Molybdenum deficiency made the rape absorb less N, P and K than application of molybdennum. 97014 absorbed more N, P and K than 97003, especially under molybdenum application.8. After the study, we found there had no obvious difference between two winter wheat under soil cultivation , but under water cultivation, They embodied the difference between two winter wheat cultivars.