Faculty of Life Sciences, Institute of Agricultural Sciences, University of the Punjab, Lahore, Pakistan.
J Sci Food Agric. 2021 Aug 30;101(11):4591-4604. doi: 10.1002/jsfa.11102. Epub 2021 Feb 15.
Due to the rapid increase in world population, the demand for freshwater is increasing day by day. There is also immense pressure on the agriculture sector to produce more food with limited supplies of water. About 75% of freshwater is used in crop production out of which 63% is lost due to poor farm practices and evapotranspiration. Enhancement of crop water productivity for sustainable agriculture production especially in areas having water scarcity plausibly contributes towards the solution of water scarcity.
The combined application of biochar and compost has a highly significant impact on maize yield with increased grain production, i.e. 6.44 and 6.52 t ha at 60% irrigation level with combined application of biochar and compost as compared with control at 6.39 and 6.44 t ha at 100% irrigation level in autumn and spring seasons, respectively, by saving 40% of water. Furthermore, the highest value of water productivity (1.51 and 1.16 kg m ) was achieved at 60% irrigation level with combined application of soil amendments. Also, cost-benefit analysis has shown highest values of net benefit with soil organic amendments.
It is concluded that addition of biochar and compost to soil has the potential to increase crop yield and growth even at low irrigation levels by enhancing water use efficiency. © 2021 Society of Chemical Industry.
由于世界人口的快速增长，对淡水的需求日益增加。农业部门也面临着巨大的压力，需要在水资源有限的情况下生产更多的粮食。在作物生产中，约有 75%的淡水被消耗，其中 63%由于农业管理不善和蒸散而流失。提高作物水分生产力，以实现可持续农业生产，特别是在水资源短缺的地区，这可能是解决水资源短缺问题的一种方法。
生物炭和堆肥的联合应用对玉米产量有显著的影响，与对照相比，在秋季和春季分别以 60%和 100%的灌溉水平下，生物炭和堆肥联合应用可分别增加 6.44 和 6.52 吨/公顷的粮食产量，在 60%的灌溉水平下可节水 40%。此外，在土壤改良剂联合应用下，水分生产力达到最高值 1.51 和 1.16 公斤/立方米。同时，成本效益分析表明，土壤有机改良剂的净效益最高。
向土壤中添加生物炭和堆肥具有在低灌溉水平下提高作物产量和生长的潜力，从而提高水的利用效率。© 2021 化学工业协会。
