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为实现农大甜研6号甜菜新品种在盐碱地的高产高效栽培,于2015年采用盆栽土培方法,设置4个Na Cl浓度(0、0.25%、0.50%、1.00%)和3个基施肥量(N-P_2O_5-K_2O∶180-165-75、225-240-150、270-315-225kg/hm~2),共12个处理;在农大甜研6号甜菜幼苗盐胁迫处理后5d开始进行幼苗生长和根、冠养分动态的测定。结果表明,盐分胁迫对甜菜幼苗生长的影响大于N、P、K养分施用量,且盐分影响甜菜幼苗中N、P、K养分的运移。与幼苗根干物质呈正相关的营养指标:K(全株,0.755)>K(冠,0.754)>K(根,0.624)>P(根,0.494)>P(全株,0.265)。相对于无盐处理,K对甜菜耐盐性的提高作用较大。0.25%Na Cl对甜菜幼苗生长有促进作用,甜菜幼苗可耐0.50%Na Cl胁迫,其中N-P_2O_5-K_2O为(225~270)-(240~315)-(150~225)kg/hm~2可促进甜菜株高、叶面积、干物质、根及全株N、P、K含量的增加,是盐胁迫条件下适宜的养分供应组合。甜菜幼苗不耐1.00%Na Cl胁迫。
In order to realize the high yield and high efficiency cultivation of new sugar beet variety of Nongdaoyan 6 in saline-alkali soil, four Na Cl concentrations (0,0.25%, 0.50%, 1.00%) and 3 basal fertilizer levels (N-P_2O_5-K_2O: 180-165-75,225-240-150,270-315-225kg / hm ~ 2), a total of 12 treatments; 5 days after salt stress treatment of sugar beet seedlings of Nongdaoyan 6 Seedling growth and root and crown nutrient dynamics. The results showed that salt stress had a greater impact on the growth of sugar beet seedlings than that of N, P and K nutrients, and salt affected the transport of N, P and K nutrients in sugar beet seedlings. K (whole plant, 0.755)> K (crown, 0.754)> K (root, 0.624)> P (root, 0.494)> P (whole plant, 0.265). Compared with salt-free treatment, K has a great effect on salt tolerance of sugar beet. 0.25% NaCl could promote the growth of sugarbeet seedlings, and the sugar beet seedling could tolerate 0.50% NaCl stress, of which N-P2O5-K2O was (225-270) - (240-315) - (150-225) kg / 2 could promote the increase of plant height, leaf area, dry matter, root and whole plant N, P, K content of sugar beet, and it is an appropriate nutrient supply combination under salt stress. Beet seedlings are intolerant to 1.00% NaCl stress.