中国农业科学Issue(1)：105-113,9.
Effect of Nitrogen and Potassium Nutrition on Carbon and Nitrogen Metabolism at Late Growing Stage and Grain Yield Formation in Spring Maize
Effect of Nitrogen and Potassium Nutrition on Carbon and Nitrogen Metabolism at Late Growing Stage and Grain Yield Formation in Spring Maize
Jin Jiyun 1He Ping1
作者信息
- 1. Soil and Fertilizer Institute ,CAAS ,Key Laboratory of Plant Nutrition Research, MOA,Beijing 100081
- 折叠
摘要
Abstract
Study on the relationship between grain yield formation and metabolism of carbon and nitrogen as influenced by N and K nutrition level during maturation was carried out through field experiments and biochemistry analyses. The results confirmed that it was necessary to maintain a higher photosynthetic capacity of leaves and abundant N supplies for root at late growing stages. The soluble protein content, RuBPC and PEPC activities in leaves, harvest index(HI) and harvest index of nitrogen (HIN)increased obviously with appropriate N and K application rate, which accelerated C and N translocation from vegetative parts to grain, enhanced photosynthetic capacity of leaves and abundant(but not excessive)N supply for root during late growing period.关键词
N and K nutrition/Spring maize/Carbon and nitrogen metabolism/Grain fillingKey words
N and K nutrition/Spring maize/Carbon and nitrogen metabolism/Grain filling引用本文复制引用
Jin Jiyun,He Ping..Effect of Nitrogen and Potassium Nutrition on Carbon and Nitrogen Metabolism at Late Growing Stage and Grain Yield Formation in Spring Maize[J].中国农业科学,2000,(1):105-113,9.
