水稻蛋白质含量的高低,常受外界环境条件影响而变化,探讨通过栽培技术措施来提高蛋白质含量,摸清杂水稻蛋白质含量与环境条件的关系,为水稻品质育种提供依据。材料和方法1、供试组合:以我国南方稻区种植面积最大的汕优2号和威优6号两个杂交组合为材料。2、试验处理:同一种源的每一组合均按不同季节(早、晚季栽培),不同施肥水平(不施纯氮、亩施纯氮10、20、30、40斤),不同密度(5×3、5×4、5×6、6×10寸),不同灌 The level of protein in rice is often affected by external environmental conditions and changes, to explore ways to improve the protein content through cultivation techniques to find out the relationship between protein content of rice and environmental conditions, and provide the basis for rice quality breeding. MATERIALS AND METHODS 1. Test combination: The two hybrid combinations, Shanyou 2 and Weiyou 6, with the largest planting area in the rice planting area in southern China, were used as materials. 2, Test treatment: Each combination of the same source according to different seasons (early and late season cultivation), different fertilization levels (no application of nitrogen, Mushi nitrogen 10,20,30,40 catties), different densities 5 × 3, 5 × 4, 5 × 6, 6 × 10 inch), different irrigation