水分处理对专用型小麦后期氮积累及子粒蛋白质含量的影响

采用盆栽方法研究了水分处理对专用小麦各营养器官氮含量积累、运转和子粒蛋白质的影响。结果表明,在不同的水分处理中,开花后随着时间的推移小麦叶鞘和茎中氮含量逐渐降低,而根中氮含量先下降后上升。（1）80％FC提高了各专用小麦叶鞘氮含量;豫麦34茎中氮含量在各处理下差异不大,豫麦49在60％FC下提高茎中氮含量,豫麦50茎氮含量在40％FC下最高。（2）各营养器官氮转运量品种间表现为豫麦50〉豫麦49〉豫麦34,各品种间不同水分处理下各营养器官氮转运量均为80％FC〉60％FC〉40％FC。（3）各品种叶鞘氮转运效率为80％FC〉60％FC〉40％FC;但不同品种间各水分处理下茎氮转运效率因存有差异,豫麦34为：40％FC〉60％FC〉80％FC,豫麦49为：60％FC〉40％FC〉80％FC,豫麦50为：60％FC〉80％FC〉40％FC。（4）各营养器官及总转运氮对籽粒的贡献率为80％FC〉60％FC〉40％FC,各品种器官转运量和贡献率均为：叶鞘〉茎,器官转运效率为：茎〉叶鞘。（5）对豫麦34,蛋白质含量和产量均以60％FC为好,且蛋白产量达显著性差异;豫麦49和豫麦50,蛋白质含量以40％FC最高,蛋白质产量以80％FC最高。豫麦49差异均达到显著水平,豫麦50蛋白质产量达极显著水平。

Effects of Different Water Treatments on Nitrogen Accumulation and Grain Protein Content of Wheat for Specialized End-Uses in Latter Period

Effects of different water treatments on nitrogen accumulation,translocation and grain protein content of wheat for specialized end-uses was studied by using basin-planted form.The results showed that N content of wheat leaf sheath and stem decreased gradually after blooming,while N content in root decreased first and then increased.(1) Nitrogen content of leaf sheath was improved with 80%field capacity treatment for three wheat varieties,N content of stem was not different significantly with three treatments for yumai 34,was improved with 60? treatment for Yumai 49 and was highest with 40% field capacity treatment for Yumai 50.(2) The result of nitrogen translocation volume of vegetative organs showed that Yumai 50> Yumai 49> Yumai 34 in three wheat cultivars and appeared that 80?>60?>40? in different cultivars with different water treatments.(3) The result of nitrogen translocation efficiency showed that 80?>60?>40? in three cultivars.However,N translocation efficiency in stem of different cultivars with different water treatments was different in three cultivars,the results showed that N translocation efficiency was 40?>60?>80? for Yumai 34,60?>40?>80? for Yumai 49,and 60?>80?>40? for Yumai 50.(4) The result of the contribution rate of vegetative organs and total N transferring to grain showed that 80?>60?>40?.The translocation volume and contribution rate of different vegetative organs showed that leaf sheath>stem,and the translocation efficiency of vegetative organs showed that stem>leaf sheath.(5) As for Yumai 34,both grain protein content and yield were highest with 60? treatment,and protein yield was different.For both Yumai 49 and Yumai 50,grain protein content was highest with 40? treatment,while protein yield was highest with 80? treatment.Both grain protein content and yield were different for Yumai 49,and only grain protein content was different significantly for Yumai 50.