The Effects of Water and Fertilizer Coupling on Growth and Yield in Semi-winterness Wheat
|School||Henan Agricultural University|
|Course||Crop Cultivation and Farming System|
|Keywords||Water and fertilizer coupling Semi-winterness wheat Photosynthetic characteristics Yield|
In order to provide the practice basis for giving the reasonable formulation irrigation and applying the fertilizer measure. This experiment took the semiwinterness wheat of Henan wheat 49-198 as a material, using two factor split-plot design, had analyzed the regulative effect of water and fertilizer coupling on growth and the effect of yield and quality photosynthetic characteristics of the semi-winterness wheat.1. Water and fertilizer coupling on the effects of the tiller dynamics of semi-winterness wheatIn the whole growth period, the tiller dynamics of semi-winterness wheat showed a growth process progress, the tiller peak appeared on jointing stage, and remained stable on flowering, finally the tiller dynamics of semi-winterness wheat showed vary very small on over-wintering stage and maturations, but the maturity slightly higher than the over-wintering stage. In different growth period, the tiller peak appeared for A2 processing. The difference between A1 and A3 processing was not quite, but the A3 slightly higher than the A1 processing. Each fertilizer processing with control treatments were the smallest, the highest number in B5 processing. In A2B5 conditions, jointing stage reached 1808×104 million plants/ hm2 growth period which was the largest number of stems and tillers.2. Water and fertilizer coupling on the effects of roots of semi-winterness wheatIn the whole growth period showed unimodal curve with the growth process progress, but at jointing stage appeared a smooth booting increased, finally reached maximum at maturity. The dry weight of root from 0 to 160cm showed a changing trend of single-peak curve, increased rapidly after jointing, booting stage was up to maximize and then started to decline. The difference of secondary roots and the dry weight of root showed decline of the decomposition process earlier before mature. Root dry weight of each treatment in jointing stage reached maximum then began to decline. In the whole processing the single root reach a maximum number in mature, The highest dry weightof roots was in A2B5 processing which reached 86.7 g/m2.3. Water and fertilizer coupling on the effects of photosynthetic characteristics of semi-winterness wheatThe Pn performed very gentle for photosynthetic characteristics on each water and fertilizer coupling before flowering, after flowering 20d began to fall and after flowering today reached the maximum. B5 processing was higher than other processing, performed for B5>B6>B3>B4>B2>B1. And the highest of photosynthetic rate after flowering was A2B5 treatment. The transpiration rate （Tr）, and stomatal conductance （Gs） presented the single-peak curve changing trends.4. Water and fertilizer coupling on the effects of yields and the influence of three elements of semi-winterness wheatWater and fertilizer coupling on the effects of yields showed B5>B6>B3>B4>B2>B1, B1 and B5 had significant difference , but no significant difference with the others. Grain weight was B2>B1>B3>B4>B6>B5, B5 and B2 had significant difference, but no significant difference with B1, B3, B4 and B6. The spikes per unit area was B5>B6>B3>B4>B2>B1, only B5 , B1 and B2 reached significant difference. Per spike was B5>B6>B3>B4>B2>B1 and no significant difference between them.Three factors on yield components from different water treatments, grain weight and the spikes per unit area were with acres of rising water increases with the reduction of the first water after increases, only per spike was increased with moisture, final performance in output of three for water between water treatment had significant influence, yielded for A1 > A2> A3.