摘要
采用盆栽试验,研究了不同W-OH喷施浓度(1%,3%,5%)对玉米生长及土壤养分淋失的影响。结果表明:与对照(不喷施W-OH)相比,喷施W-OH对玉米生长有促进作用,且这种作用自玉米生长中期逐渐明显。试验条件下,低、中浓度W-OH(1%和3%)更有利于玉米生长;盆栽3个月后,与对照相比,低、中浓度处理下玉米株高分别增加16%和35%,净光合速率分别增加3%和17%,气孔导度分别增加34%和79%,蒸腾速率分别为对照的2倍和3倍。降雨量对W-OH的保水作用影响不同,小雨和中雨下,3%浓度处理的渗流量最低,保水效果最显著;降雨量达到大雨及以上时,W-OH的保水作用与其喷施浓度成正比。在玉米生长初期W-OH的保肥作用与其喷施浓度成正比,随着后续降雨渗流反复淋溶,其保肥作用趋于稳定;3%和5%浓度的W-OH均能有效减少观测期的土壤养分淋失量,且以硝态氮降幅最大。研究结果为土壤固化剂在坡耕地中的应用提供理论指导。
A pot experiment was conducted to study the effects of different W-OH concentration（1% ,3% and 5% ）on the maize growth and soil nutrient leaching.The results showed that W-OH could effectively promote maize growth and the effect became gradually obvious since the middle stage of maize growth.Under the current experimental conditions,the light and moderate W-OH concentrations（1% and 3% ）were more beneficial to maize growth.After potting 3 months,compared with CK（without W-OH）,under the light and moderate W-OH treatments,the maize height increased by 16% and 35% ,the net photosynthetic rate increased by 3% and 17% ,the stomatal conductance increased by 34% and 79% , and the transpiration rate increased 2 and 3 times,respectively.The precipitation had a different influence on water retention of WOH.For light and moderate rainfall,3% treatment had the lowest leakage,showing the most significant water retention effect.For heavy rainfall and rainstorm,the water retention effect of W-OH was positive related to its spraying concentration.The fertilizer retention effect of W-OH was positive related to its spraying concentration at the initial stage of maize growth and tended to be stable with subsequent rainfall leaching.During the observation period,both 3% and 5% treatments effectively reduced the total nutrients leaching loss,especially for nitrate nitrogen.The findings can provide scientific guidance for application of soil stabilizer in slope l and .
作者
张冠华
孙金伟
牛俊
朱秀迪
谢浩
孙宇婷
ZHANG Guanhua SUN Jinwei NIU Jun ZHU Xiudi XIE HaG SUN Yuting(Soil and Water Conservation Department, Changjiang River Scientific Research Institute, Wuhan , 430010 Research Center on Mountain Torrent ~c Geologic Disaster Prevention of Ministry of Water Resources, Wuhan , 430010)
出处
《水土保持学报》
CSCD
北大核心
2017年第5期247-252,259,共7页
Journal of Soil and Water Conservation
基金
水利部技术示范项目(SF-201601)
中央级公益性科研院所基本科研业务费重点项目(CKSF2017050/TB
CKSF2017028/TB)
国家自然科学基金项目(41301298)
