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当前位置: 首页 > 文章 > 旱地小麦根系的再生能力及化学调节 中国农业科学 2002,35 (10) 1204-1207
Position: Home > Articles > The Root Regeneration of Dryland Winter Wheat and Chemical Adjustment Scientia Agricultura Sinica 2002,35 (10) 1204-1207

旱地小麦根系的再生能力及化学调节

作  者：
赵先贵
单  位：
陕西师范大学旅游与环境学院
关键词：
冬小麦;根系再生;旱地;氮肥
摘  要：
通过模拟试验、田间试验和15N示踪技术 ,研究了干旱条件下小麦根系的再生能力及CCC(氯化氯代胆碱 )处理对根系再生能力的影响。试验结果表明 ,经过冬、春干旱的危害 ,分布在耕作层的小麦根的表皮细胞全部剥落 ,完全丧失了吸收功能 ;当土壤水分状况改善后 ,这部分已受害的根虽无法恢复其吸收功能 ,但小麦可从分蘖节处再生新根 ,从而恢复其吸收功能。试验条件下 ,春季降水后每株小麦可产生 6条以上新的次生根 ,1%CCC浸种可提高根系再生能力达 2 0 %以上。因此 ,在旱地小麦生产中 ,应充分重视小麦根系的再生能力及各种化学调节手段 ,在返青至拔节期遇到 2 0mm以上的降水时 ,可追施适量速效氮肥 ,并采取保墒措施 ,以获得小麦高产。
译  名：
The Root Regeneration of Dryland Winter Wheat and Chemical Adjustment
作  者：
ZHAO Xian gui (College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi'an 710062)
关键词：
Winter wheat; Root regeneration; Dryland; Nitrogen fertilizer
摘  要：
This paper dealt with the wheat root regeneration ability and effects of application of CCC(chlorocholine chloride) on root regeneration under dry conditions through the simulation, field experiments and 15 N track technique. The results of which indicated that after arid harm during winter and early spring the wheat root epidermis cells in the cultivation layer were desquamative, and the root's absorptive function was lost. When soil water condition is improved, although the damaged root's absorbabillity function can not able to renew, wheat can produce new roots from tillering nodes, so its absorptive function can be resumed. Under the experiment condition, each wheat can produce more than 6 new secondary roots after spring rain, and seed soaking in 1% CCC solution can increase the ability of wheat root regeneration by 20% higher that of the control. Therefore in dryland wheat production, it was should pay attention to the ability of wheat root regeneration and various chemical regulation measures. When there is 20 mm precipitation during elongation stage, the higher wheat yield can be obtained by nitrogen fertilizer application and preservation of soil moisture.

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