保水剂对基质栽培菜心生长及水分利用效率的影响

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 15 期数: 2008年04期页码: 228-230,233 栏目: 出版日期: 2008-08-20

Title:: Effects of Water Retaining Agent on Growth and Water Use Efficiency of Chinese Cabbage Under Substrate Culture

Author(s):: XIE Yong, DU Jian-jun, LI Yong-sheng; Lab of Plant Nutrition and Fertilizer, Zhongkai University of Agriculture and Technology, Guangzhou 510225 China

摘要:: 在基质中加入不同用量的保水剂，测定基质物理性状，并进行不同水分处理条件下菜心盆栽试验，研究保水剂对菜心光合特性及水分利用效率的影响。结果表明：在每1 L基质分别加入1，2，4，8 g保水剂时，与对照（未加保水剂）相比，基质持水量分别增加16.35%，34.00%，61.29%和135.16%，容重分别降低3.61%，5.37%，9.42%和14.64%；在基质相对持水量分别为60%，80%及100% 3种处理下的菜心水分试验中，每1 L基质施用2 g保水剂时，与对照（未加保水剂）相比，光合特性和水分利用效率随水分胁迫程度加重而明显提高。

Abstract:: The physical characteristics of the substrate were measured and the effects of water retaining agent (WRA) on photosynthesis characteristics and water use efficiency of Chinese Cabbage were stusied under different water treatments conducted the pot experiments. The results showed that the water holding capacity of the substrate was significantly increased along with the increase of WRA rates of application. As compared with control treatment (no addition of WRA), at the rates of 1,2,4,8 g WRA per liter of substrate, water holding capacity was increased by 16.35%, 34.00%, 61.29% and 135.16% respectively. And the bulk density was decreased by 3.61%, 5.37%, 9.42% and 14.64%, respectively. Under the water stress, when relative moisture content in the substrate was 60%, 80%,100% and the dosage of WRA was 2 g/L, as compared with control, photosynthesis characteristics and water use efficiency was increased as water stress became serious.

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更新日期/Last Update: 1900-01-01