Effects of Different Nitrogen Application Rates on Yield and Quality of Mid-ripe and Medium Geng Rice Varieties in Coastal Areas of Jiangsu Province
HU Lei
SUN Yibiao
ZHANG Guiyun
DAI Jinying
ZHU Jingwen
WANG Aimin
ZHU Guoyong
SUN Mingfa
YAN Guohong
Abstract：In order to determine the effects of nitrogen fertilizer application on yield and quality of mid-ripening and medium geng rice in coastal areas of Jiangsu Province,Nangeng 5718 and Yandao 8269 were used as experimental materials,and field experiments were conducted under two treatments:no nitrogen fertilizer (N0) and 20 kg/667 m2 (N20) equivalent nitrogen application. The differences of yield,composition factors,cooking and eating quality of middle-ripe geng rice varieties under two nitrogen application conditions were studied by comparison and analysis. The results showed that after applying 20 kg/667 m2 of pure nitrogen,the number of peak seedlings,effective panicle number,thousand-grain weight and yield of Nangeng 5718 increased by 63.27%,62.94%,7.55% and 81.96%,respectively. Yandao 8269 increased by 62.23%,9.94%,5.80% and 79.89%,respectively. The eating quality of two varieties decreased by 8.89% and 4.12%,respectively. The milled rice rate was increased by 2.00% and 1.59%,respectively. The chalkiness and chalkiness grain rate decreased by 16.99%,10.13% and 23.42%,7.7%,respectively. Protein content was significantly increased by 16.67% and 9.59%,respectively. Therefore,pure nitrogen application of 20 kg/667 m2 can improve the yield of medium-ripe and medium geng rice,reduce the cooking and eating quality of rice,and improve the nutritional quality,processing quality and appearance quality of rice in the coastal areas of Jiangsu Province.
Keywords：Nitrogen fertilizerGeng riceYieldQuality
Publication Date：2024-06-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 33-37,49 )