| 孙海妮,王仕稳,李雨霖,杨文稼,殷修帅,殷俐娜,邓西平.生物炭施用量对冬小麦产量及水分利用效率的影响研究[J].干旱地区农业研究,2018,36(6):159~167 |
| A field trial was conducted to study the effects of biochar application rates and the straw-return on soil water content, soil nutrient, crop yield, and water use efficiency. There were five treatments:no biochar(CK), 15 t·hm-2 biochar(BC1), 30 t·hm-2biochar(BC2), 45 t·hm-2 biochar(BC3), and straw-return. Results showed that the soil NO-3-N, NH+4-N, available K, and organic matter content increased with increasing application rates of biochar in all growth stages of wheat.Soil water storage, available P, and crop yield, water-use efficiency increased initially but decreased subsequently with increasing application rates of biochar. Compared to the control and other biochar rates,the 30 t·hm-2 of biochar significantly achieved peak yield (a 17.2% increase over CK to 6 640 kg·hm-2) and water-use efficiency (an increase of 17.8% to 18.1 kg·hm-2·mm). The straw-return increased yield by 10.5% but no effect on the water-use efficiency. Therefore, applying the appropriate rate of biochar can significantly improve soil fertility, crop yield, and water-use efficiency. |