CAJ | 학술논문

通过盆栽小区试验，研究不同供氮量下文冠果幼苗生长和光合生理特性的动态变化，以确定文冠果育苗最佳氮肥施用量。试验共设5个处理，氮素用量分别为0，130，180，230，280 mg·seedling -1，以 N0，N1，N2，N3，N4表示，每处理各栽植20盆。各处理氮肥在生长季分12次等量施入，每周施氮肥1次。结果表明：施用氮肥可显著提高幼苗各个时期的生长指标，其中 N3处理效果最好，生长旺季叶片氮钾养分含量分别比对照提高13.64%和60.97%，生长季末的干物质积累量、氮磷钾素积累量分别比对照提高42.70%，27.43%，7.71%和105.36%，根茎部氮养分含量分别比对照提高77.55%和38.83%。N3处理的幼苗光合特性表现最佳，且根系总生物量、体积和比根长较其他处理显著增加。N1处理在生长旺季叶部磷养分含量比其他处理提高22.77%～74.39%。综合分析认为文冠果幼苗的施氮量控制在230～280 mg·seedling -1范围内较好。
통과분재소구시험，연구불동공담량하문관과유묘생장화광합생리특성적동태변화，이학정문관과육묘최가담비시용량。시험공설5개처리，담소용량분별위0，130，180，230，280 mg·seedling -1，이 N0，N1，N2，N3，N4표시，매처리각재식20분。각처리담비재생장계분12차등량시입，매주시담비1차。결과표명：시용담비가현저제고유묘각개시기적생장지표，기중 N3처리효과최호，생장왕계협편담갑양분함량분별비대조제고13.64%화60.97%，생장계말적간물질적루량、담린갑소적루량분별비대조제고42.70%，27.43%，7.71%화105.36%，근경부담양분함량분별비대조제고77.55%화38.83%。N3처리적유묘광합특성표현최가，차근계총생물량、체적화비근장교기타처리현저증가。N1처리재생장왕계협부린양분함량비기타처리제고22.77%～74.39%。종합분석인위문관과유묘적시담량공제재230～280 mg·seedling -1범위내교호。
In an effort to determine the optimal nitrogen application rate for Xanthoceras sorbifolia,a series of pot trials were conducted to investigate the effects of different nitrogen application rates on the growth and photosynthetic characteristics of the species. Five nitrogen levels of 0 ( N0 ) ,130 ( N1 ) ,180 ( N2 ) ,230 ( N3 ) and 280 ( N4 ) mg·seedling -1 were applied with five replications. Fertilization in the form of urea was applied once a week and 12 times throughout a single growing season; the amount of fertilizer was the same in each nitrogen application. The results showed that N fertilizer was able to significantly improve growth indicators of seedlings in each period. N and P nutrient content of leaf in growing season of N3 treatment increased by 13. 64% and 60. 97% compared with the controls. Dynamic accumulation of dry matter,N,P,K nutrient accumulation,and N nutrient content of root and leaf by the end of growing season increased by 42. 70%,27. 43%,7. 71%,105. 36%,77. 55% and 38. 83% compared with the controls. Photosynthetic characteristics in N3 treatment were best,and total root biomass,volume and specific root length in N3 significantly increased compared with other treatments. N1 treatment promoted P absorption,and the P nutrient content of leaf in growing season was from 22. 77% to 74. 39% higher compared with other treatments. Taking into account other factors,the best application of N for X. sorbifolia seedlings was from 230 mg·seedling -1 to 280 mg·seedling -1 .