The Effect Of Different Nitrogen Treatment On Development Characteristic And Quality And Yield Of Xinjiang White Garlic

The experiment was conducted in studying the effect of nitrogen application on the yield and quality, garlic bulbs in alpine region white garlic with six fertilizer treatments and five nitrogen level in Xinjiang. The results showed that:1.Nitrogen fertilizer was very important on the growth and development of garlic,especially for the promotion of the role of garlic seedling stage,the experiment was done to study the garlic agronomic and physiological traits,the high level of nitrogen increased plant height,stem rough,leaf area on the early phase,but the high level of nitrogen decreased these Characteristics,the results showed that high nitrogen had to early ageing of garlic.2.The peak of nitrate reductase(NR) active Low was delayed by level of nitrogen,and weak seedlings were produced,yield was reduced;The high the level of nitrogen declined in NR activity and the nitrogen assimilation and the yield from the expansion period of(105d) to the end of growth period.3.The high level of nitrogen application increased rapidly the growth of the below part of in garlic, the moderate levels of nitrogen fertilizer was more conducive to the development of the underground bulb; The high level of nitrogen increased accumulation of dry matter with garlic on the early phase;but the high level of nitrogen increased accumulation of dry matter with garlic in the expansion period;the yield was high with N4 treatment of nitrogen rate 780kg/hm² in the study.4.The moderate levels of nitrogen increased the accumulation of amino acids and improved the nitrogen content of garlic,but too much nitrogen fertilizer was not.The accumulation of amino acids was improved with N4 treatment of nitrogen rate 780kg/hm²,and the more nitrogen fertilizer,the more garlic water content was,high-nitrogen increased the free water content of garlic.5.Nitrogen uptake was positively correlated with nitrogen fertilizer rate of garlic,and was negatively correlated with the utilization of nitrogen,nitrogen utilization of N₅ treatment was minimum,44.31%. Residues in soil and residue with the nitrogen input were increased with the increasing of nitrogen fertilizer rate,the apparent loss of nitrogen also increased,the total nitrogen fertilizer rate was decreased 28.74%to 42.46%;So the total of nitrogen fertilizer rate was loss of leaching or volatile,resulting in economic losses and environmental pollution.