转型期作物生产发展的机遇与挑战

邹应斌,黄敏

Opportunities and Challenges for Crop Production in China during the Transition Period

Ying-Bin ZOU,Min HUANG

表2 长江中下游地区不同种植方式条件下作物的种植密度和用种量比较

Table 2 Planting density and seed rate for crops grown under different planting methods in the middle and low reaches of Yangtze River

作物 Crop	人工育苗移栽 Manual seedling transplanting			人工直播栽培 Manual direct seeding
	种植密度 Planting density (×10³ hills hm^-2)	用种量 Seed rate (kg hm^-2)		种植密度 Planting density (×10³ hills hm^-2)	用种量 Seed rate (kg hm^-2)
	种植密度 Planting density (×10³ hills hm^-2)	常规种子 Inbred seed	杂交种子 Hybrid seed	种植密度 Planting density (×10³ hills hm^-2)	常规种子 Inbred seed	杂交种子 Hybrid seed
油菜 Oilseed rape	30-45	1.5-3.0	≤1.5	≥300	7.5-9.0	≤4.5
棉花 Cotton	15-45	15-30	≤15.0	67.5-180	45-60	≤30
水稻 Rice	180-360	45-60	≤22.5	450-750	60-90	30-45
玉米 Maize	45-60	—	≤15.0	120-150	—	30-45