施肥对黄土高原旱地小麦品质和籽粒氨基酸含量的影响

在长期肥料定位试验的基础上,研究了施肥对小麦品质和籽粒氨基酸含量的影响。结果表明,施氮 能提高小麦营养品质,增强面团强度和筋力,降低面团的延展性,提高籽粒氨基酸含量;施磷对小麦营养品质和籽 粒中氨基酸含量无明显影响,但能增强面团延展性,降低面团强度和筋力;NPK配施和NP配施对小麦营养品质改 良作用明显,均有利于提高面团的耐揉性、强度和筋力,降低面团的延展性,但二者之间的差异并不明显。NPK配 施对小麦籽粒中总氨基酸含量影响不明显,但能提高小麦籽粒中的必需氨基酸含量;NP配施能提高小麦籽粒中的 总氨基酸含量。但对非必需氨基酸含量的提高作用更为明显。施肥对小麦品质影响的大小排序为N>NPK>NP> P;对籽粒氨基酸含量影响的大小排序为N>NP>NPK>P。

Effect of wheat quality and amino acid quantity of different fertilizings in dryland of Loess Plateau

Based on the long-term fertilization experiment, this article studied the effects of different fertilizers on the quality of wheat and the content of amino acid. Results showed that N fertilizer could improve the nutrition quality of wheat, increase paste strength and flexibility and A A quantity, but decrease paste ductibility. P fertilizer could not obviously improve the nutrition quality of wheat and AA content, but could decrease paste strength and flexibility .promote paste ductibility. The cooperative application of chemical fertilizers was beneficial in improving the nutrition quality of wheat increasing paste strength and flexibility,while decreasing paste ductibility. NPK and NP produced no obviously different effects on wheat quality, the effect of NPK on total A A content was not obvious, but could improve the essential A A content ;NP could improve the total A A content and the inessential A A content; The order of effect of fertilizer combinations on wheat quality was:N>NP>NPK>P.