| 丘陵红粘土旱地冬小麦根系生长规律的研究 |
| |
| 引用本文： | 王绍中 茹天祥. 丘陵红粘土旱地冬小麦根系生长规律的研究[J]. 植物生态学报, 1997, 21(2): 175-190 |
| |
| 作者姓名： | 王绍中 茹天祥 |
| |
| 作者单位： | 河南省农科院(王绍中)，河南省渑池县农科所(茹天祥) |
| |
| 基金项目： | 河南省自然科学基金基础研究项目 |
| |
| 摘 要： | 对豫西丘陵红粘土旱地小麦根系生长规律进行的研究结果表明：初生根、次生根长度和根条数均随生育期后延而增加，根系最大入土深度可达340cm，根系生物量(Y，kg·hm-2的增长为5次曲线方程：Y＝495.195-40.980X+1.3530X2-0.014985X3+0.0000699X4+0.000000116X5，表现出越冬前和冬后至抽穗期两个增长高峰，各生育期根条数和根系生物量在土体中的分布均符合Y=ae-bx的由上到下的负指数递减方程；土壤含水量与根系生长的关系表现为，当土壤含水量低于16％时，根系和地上部分均不能正常生长，根系入土深度(Y，cm)和根尖处土壤含水量(X，％)的函数关系为：Y＝2.009e0.2204X；次生根的发生与主茎叶片数没有明显的对应关系，而与分蘖的发生相对应，根系干物质积累与地上部分干物质积累存在着正向协同关系；初生根条数增加可显著增加成穗数，次生根条数增加则主要对穗粒数和千粒重有促进作用；用叶面宝、磷酸二氢钾等微肥、激素浸种可有效增加根的数量和根系入土深度，促进根系干物质和地上部分干物质的积累，增加成穗数和穗粒数，显著提高小麦产量。
|
| 关 键 词： | 红粘土 旱地 冬小麦 根系 生长规律 |
INVESTIGATION ON THE GROWTH RULE OF ROOT SYSTEM OF WINTER WHEAT IN SEMIARID RED CLAY SOIL HILLS |
| |
| Wang Shaozhong and Ru Tianxiang. INVESTIGATION ON THE GROWTH RULE OF ROOT SYSTEM OF WINTER WHEAT IN SEMIARID RED CLAY SOIL HILLS[J]. Acta Phytoecologica Sinica, 1997, 21(2): 175-190 |
| |
| Authors: | Wang Shaozhong and Ru Tianxiang |
| |
| Abstract: | The growth rule of root system of winter wheat in semiarid red clay soil hills in west Henan was investigated during 1987～1993. The results show as follows: the growth of primary and secondary roots and root number tended to increase with prolongation of the growing of root system, the maximum depth of the root system can be 340 cm, the increasing equation of root biomass (Y, kg·mu-1) is Y=33.013-2.732X+0.0902X2-0.000999X3+0.00000466X4- 0.00000000770X5, which has two peaks before overwintering and duration from rising to jointing respectively. The distributions of the root number and biomass inside soil were in keeping with the equation Y= ae-bx. When soil water capacity was bigger than 16 %, the growth of root system and aboveground part was all abnormal. The function relationship between root depth and soil water capacity around root tips can be described with equation Y= 2.009e0.2204X. Appearing of secondary root was not corresponding with number of leaves on the stem but with tillering. The dry matter accumulation of root system was in coordination with aboveground part. The increasing of primary root number can improve ear/plant. The increasing of secondary root number can raise grain/ear and weight/1000 grain. The improvement of root growth and yield due to soaking seed with microelement fertilizer or hormore was significant. |
| |
| Keywords: | Redclay soil Dry land Winter wheat Root system Growth rule |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《植物生态学报》浏览原始摘要信息 |
|
点击此处可从《植物生态学报》下载免费的PDF全文 |
