保护性耕作对复播油葵干物质动态变化的影响  

Dynamic Change of Dry Matter Accumulation and Distribution of Sunflower under Conservation Tillage in Stubble-field

作　　者：杨相昆[1] 魏建军[1] 张占琴[1] 田海燕[1] 

机构地区：[1]新疆农垦科学院作物所,谷物品质与遗传改良兵团重点实验室,新疆石河子832000

出　　处：《西北农业学报》2012年第4期71-76,共6页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：十二五国家科技支撑计划课题(2011BAD29B06);兵团重大产学研合作科技专项计划(2010ZX01);科技支疆专项计划(2009ZJ02)

摘　　要：为研究保护性耕作栽培条件下复播油葵干物质积累规律,指导生产实践。采用单因素随机区组试验设计,于复播油葵不同生育期取样,测定各器官干物质积累量。结果表明,免耕复播油葵可以使生育期延长;复播油葵干物质积累呈直线上升趋势,总体干物质积累水平犁地处理低于免耕处理;干物质增长速率呈单峰曲线变化;2种耕作条件下,净干物质分配均随生长中心的转移而发生变化;免耕处理生物产量、籽粒产量及收获指数略低于犁地处理。而花盘直径、结实率及百粒质量等性状却优于犁地处理。In this research, the characteristics of dry matter accumulation and distribution of sunflower under conservation tillage in stubble-field were studied to provide the reference for practical process in the reclamation region of North XinJiang. The single factor randomized block design was used, and the dry matters of different organs of sunflower were measured in different growth stages. Results showed that the growth period of sunflower under no-tillage in stubble-field can be extended. The dry matter accumulation of sunflower in stubble-field increased linearly. The overall level of dry matter accumulation under plowing tillage was lower than that under no-tillage treatment. The accumulation of dry matter showed a single peak curve. Distribution of net dry matter changed with the growth cen- tre changing under either no-tillage or plowing tillage treatment. The biological yield, grain yield and harvest index under no-tillage was lower than that under plowing tillage treatment, but the diameter of the flower disc, seed setting percentage and the weight of 100-seeds showed the opposite trend.

关 键 词：油葵 保护性耕作 免耕 复播 干物质 积累 分配 

分 类 号：S565.5[农业科学—作物学]