Effects Of Zinc Fertilizer Rates And Application Methods On Potato Tuber Yield Formation And Nutritional Quality

Zinc is a necessary micronutrients, plant growth and development are importantcomponents of enzymes in plants and to promote the photosynthesis and thetransformation and transportation of the product have important role, and through thefood chain and health are closely related to people and animals. Calcareous soils innorth China is generally lack of effective zinc, when soil for zinc deficiency, cropyield and quality will be affected by significantly, thus affect human health. Gansupotato production long-term focus on a lot of element such as nitrogen, phosphorusand potassium fertilizer application, ignoring the trace elements, cause seriousinfluence to potato tuber yield and quality of. Research shows that different zincspraying on the leaf fertilizer to improve the yield and potato tuber zinc content havecertain effect, but the appropriate dosage of zinc foliar fertilizer is not yet clear, so thisstudy in ding xi city, gan su province xiang quan township potato growing fieldtrials, the seed soaking and spraying on the leaf of different concentrations of zincfertilizer on potato yield formation and main nutritional quality, to improve the qualityof potato tuber yield, nutrition and tubers zinc content to provide the ideal dosage ofzinc fertilizer. Test the main research results are as follows:1.Under this experimental condition, proper application of zinc fertilizer, can enhancelong shu3potato production and commodity potato rate, but too much zinc, potatoproduction is reduced,0.2%zinc sulfate seed soak+foliar spray zinc fertilizer toimprove the potato production. With the increase of spraying zinc levels, long shu3potato tuber first rise after the fall of commodity potato rate performance,0.2%ZnSO47H2O spraying on the leaf for maximum yield of zinc foliar fertilizerconsumption, spraying zinc concentration of more than0.2%, the potato yield decline.Zinc fertilizer seed treatments to improve the potato yield and commodity rate ofpotato, under different foliar spraying zinc concentration, compared with not seedhandling, seed soak+spray zinc fertilizer processing production were higher than control, which soaked+spray on the leaf with0.2%ZnSO47H2O (T4) than withoutzinc control treatments (T1) yield increased12.6%, spraying0.2%ZnSO47H2O thanprocessing production increased by5.8%.2.Under this experimental condition, applying zinc fertilizer increase the dry matteraccumulation of potatoes, but excessive zinc, reduced the volume of potato, drymatter accumulation, seed soaking+spraying0.2%ZnSO47H2O on the leaf drymatter accumulation amount is the largest. Potato dry matter accumulation amountafter the first increase with the increase of spraying zinc concentration performancedecline. The results showed that the seed soaking+spraying different concentrationsof zinc fertilizer amount of dry matter accumulation of aerial part’s largest T5,50.1g/plant,18.1%increase over the T1. Spraying different concentrations of zinc fertilizerprocessing in the largest amount of dry matter accumulation of aerial part for T3,45.1g/plant. According to the size of the price scissors, it can be seen that the discretion ofthe tuber yield, dry matter accumulation of leaf and stem tuber volume between theformation of the price scissors is gradually increasing with the increase of sprayingzinc concentration, when reached0.4%ZnSO47H2O, with smaller with the increaseof spraying zinc level, seed handling the scissors than no seed handling, shows thatthe seed treatment can improve the potato production.3. Under this experimental condition, exogenous application of differentconcentrations of zinc fertilizer for potato’s growth period of different organs of drymatter distribution ratio influence degree is different, in the whole growth period ofpotato in the degree of influence on the distribution rule of the root is not obvious, inthe mature period of two processing of potato increased in leaf and stem dry matterdistribution of dry matter, but not significantly affect the distribution of dry matter inpotato tubers. Seed handling of potato has a little influence on dry matter allocationrate.4.Within a certain range along with the improvement of spraying zinc potato tuber ofsoluble sugar, reducing sugar, free amino acid, protein, and vc, starch content wereincreased, but when excessive zinc concentration began to decline. Spraying zincconcentration from0.1%-0.4%of ZnSO47H2O for the improvement of the best quality potato zinc fertilizer concentration range. After seed soaking on potato tuberquality has a certain role in promoting.5.Under this experimental condition, the increase of spraying zinc levels in potatotuber yield were significantly increased the content of zinc and zinc. Seed soaking+spraying different concentration tuber zinc content in zinc fertilizer treatment and zincproduction are highest T6(0.8%ZnSO47H2O), spraying different concentration tuberzinc content in zinc fertilizer treatment and zinc production are highest T5(0.4%ZnSO47H2O). After the seed handling tuber zinc content and zinc production hasimproved significantly. The significant difference between the groups.