关键词: 影响, 影响

Abstract:

Barnyard grass is one of the common gramineous weeds in paddy field. And they can compete for ecological factors with rice. This paper reviews the research status of the competitive relationship of rice and barnyard grass at home and abroad. Rice can take advantage of the growth stages by seedling and transplantation. Cultivation and breeding methods such as weed-suppressing rice breeding, density control and varieties of high straws and large panicle, which can improve the competition of rice. Mathematic models are used to quantify the competition between rice and barnyard grass. Control strategies must be in time and effective in direct seeding rice field.