腐植酸肥料在膜下滴灌水稻种植中的应用效果试验

在水稻生长的不同时期,分6次滴施5 kg/667 m~2和7 kg/667 m~2腐植酸肥料,研究其对水稻的根系发育、株高、分蘖数、叶绿素含量、净光合速率、理论产量及产量构成因素的影响。研究结果表明:7 kg/667 m~2施用量处理在株高、平均分蘖数、净光合速率等方面优于5 kg/667 m~2施用量处理,但5 kg/667 m~2施用量处理在根系发育、叶绿素含量、理论产量及产量构成因素等方面要优于7 kg/667 m~2施用量处理,且施用腐植酸肥料处理各指标均优于未施用腐植酸肥料的对照组。综合考虑肥料成本和经济效益,建议在推广水稻膜下滴灌种植时采用腐植酸肥料5 kg/667 m~2的施用量。

Application Effects of Humic Acid Fertilizer on Rice Cultivation with Drip Irrigation under Film

The influence of humic acid fertilizer on the root development, plant height, tiller numbers, chlorophyll content, net photosynthetic rate, theoretical yield and yield components of rice were studied in different growth stages by dripping 5kg/667m2 and 7kg/667m2 in six times. The results showed that the treatment of 7kg/667m2 increased plant height, the average tiller number and net photosynthetic rate than those in 5kg/667m2 treatment, but the opposite result occurred in root development, chlorophyll content, theoretical yield and yield components. Moreover, the treatments that used humic acid fertilizer had better indexes than control group. Considering the cost of fertilizer and economic beneift, the application of 5kg/667m2 humic acid fertilizer were suggested when planting rice with drip irrigation cultivation under iflm.