Effect Of Boron, Molybdenum And Zinc On Yield And Quality Of Brassica Napus And Its Mechanism

Pot culture was conducted to study the effect of boron, molybdenum and zinc on seed yield and oil quality of two cultivars of Brassica napus, and its nutritional mechanism was elementarily studied. The main results were obtained as follows:1. Application of boron, molybdenum and zinc had different effect on seed yield and yield forming factors of two cultivars of Brassica napus. Boron alone or boron with molybdenum together had obvious effect on increasing siliques of two cultivars of Brassica napus. Molybdenum had more apparent influence on raising thousand grain weight, and moreover, boron and molybdenum had also effect on raising number of seed per silique. Zinc had a little effect on increasing silique, seed number and thousand grain weight. Thus, boron, molybdenum and zinc increased seed yield in a range from 6.89%-29.1%.2. To some extent, the oil content and quality of tape(Brassica napus) can be influenced by B, Mo and Zn. To apply B or Mo is beneficial for increasing the oil content, however, the effect of B is better than that of Mo. Applying Zn has no significant effect on increasing oil content, even for some cultivars, there may be an opposite result by Zn. There exists a negative relationship in microelement nutrition between seed production and oil content, that is to say, the increasing extent of seed production of Zhongshuang 6 was more than that of Zhongyou 821, contrariry, its increasing extent of oil content was less than Zhongyou 821. With application of B or Mo, the linen content can be decreased, but the content of Lionlenic acid may be decreased or increasing. Applying B, Mo or both B and Mo can increase oleic acid content in Zhongyou 821 and Zhongshuang 6, and decrease their Erucic acid contents. Single applying B or B and Mo was beneficial for decreasing glucosindate content, but the decreasing content was different in different rape cultivars.3. To some extents, to apply B, Mo, Zn or their combinations can influence the activities of glutamine synthetase GS and glutamine transfer GS. There exists unsignificantfy negative relativity between glutamine synthetase GS and oil content.4. To some extents, applying B, Mo, Zn or their combinations can influence the uptake of B, Mo or Zn. For the two cultivars, the different uptake of B, Mo, Zn have different influences on seed production and quality.