Effects Of Nitrogen Combined With Phosphate Applying On Yield And Quality Of Buckwheat In The North Foot Of Yin Shan Mountain

The experiment was earned-out in the WuChuan country, in the north region of Yin Shan moutain, Inner Mongolia in2010-2011. Aimed at the effects of different applying fertilizing content on buckwheat growing and developing, quality and yield, hoping to offer a theoretical guide on the drying farming buckwheat in the north area of Yin Shan mountain. The results shows:(1)Different applying fertilizing content can increased obviously process of buckwheat growing and developing. Single applying nitrogen fertilizer and single applying phosphate fertilizer, performed firstly increasing then decreasing trend on stem height, main stem branches, main stem nodes, yet treatments corresponding peak value was different, single nitrogen respectively were N6,N6and N8treatment, single phosphate P4,P4and P6treatment. Effects of nitrogen treatments combined with phosphate on stem height, main stem branches, main stem nodes presented firstly increasing then decreasing trend in every phosphate level, with increasing of phosphate level, treatment corresponding peak value in every level begin to move on front (nitrogen grade from up to down), when up to P10level, peak value is already N4grade. Compared with CK, different fertilizing content brought about a positive promoting on stem height, main stem branches, main stem nodes in different extent.(2)Effects on buckwheat dry matter accumulation. Single applying nitrogen fertilizer and single phosphate fertilizer, performed a single peak curve trend in all kinds of growing stage, the treatments corresponding peak value were N8and P6respectively, with the progress of growing and developing stage, dry matte accumulation in every treatment presented increasing trend, dry matter distribution in mature period, peak value were N4and N6respectively, ratio of distribution presented in order of stem>grain> leaf. Under nitrogen treatments combined with phosphate, dry matter accumulation performed a single peak curve trend, with increasing of phosphate content, the dry matter content of buckwheat on the whole presented, decreasing trend, the ratio of distribution, with increasing of phosphate content, the grade corresponding peak value begin move forward to front, N10grade in every phosphate level start to decrease trend with its moving on.(3)Effects on chlorophyll (SPAD value) content, single applying nitrogen fertilizer, single applying phosphate fertilizer and nitrogen treatments combined with phosphate, every treatment presented firstly increasing then decreasing, the treatment corresponding peak value were N6, P8and P8N8treatments. Flavone of buckwheat stem and leaf under three models, compared with CK, all performed decreasing trend and that decreasing range of stem is bigger than that of leaf, however, contrast to grain, presenting increased trend. In change of buckwheat lysine, single nitrate and single phosphate, performed first up then down trend, nitrogen treatments combined with phosphate, presented first coming up, then coming down, coming up again, performed the same trend at phosphate4level.(4)Effects on100grains weight and yield, under different applying fertilizer conditions, the differences in all treatments were not significance, but compared with CK, all of them were increasing in different extent. Among them, P6N8treatment, weight of100grains was the biggest, up to2.52g, P8N10, the smallest,2.12g; each treatment under different fertilizing, compare with CK, did not reach differences significant, but there was no differences between the maximum value and the minimum value. Yield under different applying fertilizer conditions, P6N8, the biggest one,1697.9kg/hm2, at P6level, every treatment more better than that of other level.