Interactive Effects of Nitrogen and Potassium on Grain Yield and Quality of Waxy Maize

被引:11
|
作者
Zhang, Qijian [1 ]
Li, Guanghao [1 ]
Lu, Weiping [1 ]
Lu, Dalei [1 ]
机构
[1] Yangzhou Univ, Jiangsu Key Lab Crop Genet & Physiol, Jiangsu Key Lab Crop Cultivat & Physiol, Jiangsu Coinnovat Ctr Modern Prod Technol Grain C, Yangzhou 225009, Jiangsu, Peoples R China
来源
PLANTS-BASEL | 2022年 / 11卷 / 19期
关键词
waxy maize; interactive effects of N and K; yield; pasting and thermal property; PHYSICOCHEMICAL PROPERTIES; SIZE DISTRIBUTION; NUTRIENT-UPTAKE; PHOSPHORUS; WHEAT; FERTILIZATION; STARCH; ACCUMULATION; FERTILITY; CORN;
D O I
10.3390/plants11192528
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Reasonable fertilization of nitrogen (N) and potassium (K) had significant effects on maize growth. In this experiment, two N levels (N180 and N225 kg ha(-1)) and four K treatments (KO, K75, K150 and K75 + 75 kg ha(-1)) were set to study the effects of combined application of N and K on the grain yield and quality of waxy maize. The results showed that grain yield increased with increasing K under the same N level, and top-dressing K further increased the grain yield. K application increased starch content significantly at N180 and decreased significantly at N225, while the protein content increased significantly at the two N levels. The grain starch content with the K75 + 75 treatment increased by 5.8% and 9.0% compared with K150 at the two N levels, and the protein content decreased by 2.9% and 4.7%. Application of K increased the retrogradation enthalpy (Delta H-ret) and retrogradation percentage (%R) at N180. At N225, the Delta H-ret and %R of K75 and K150 decreased, while those of K75 + 75 increased. The Delta H-ret and %R under K75 + 75 at N180 were lower than N225. Under these experiment conditions, 75 kg ha(-1) K2O at sowing date and top-dressed 75 kg ha(-1) K2O at jointing stage (V6) under the conditions of appropriate N reduction could not only effectively improve the pasting and thermal properties of waxy maize flour, but also stabilized the grain yield.
引用
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页数:14
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