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| Effects of different mulching patterns on soil moisture, soil temperature and yield of kiwifruit |
| LIU Lihao, WANG Hui, TAN Shuai, HU Chuanwang, LU Jiayu, TONG Chenhui |
| College of Water Resources and Civil Engineering, Hunan Agricultural University, Changsha, Hunan 410128, China |
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Abstract In order to realize the sustainable development of kiwifruit industry, aiming at the problems such as the decline of kiwifruit yield and quality caused by the seasonal drought in South China and the high temperature stress in summer soil, the reasonable and effective mulching measures were explored to improve the soil temperature and moisture environment of orchards. Through field observation experiment, the changes of soil moisture and temperature under six different mulching treatments, including black mulching(H), white mulching(B), weed-proof mulching(F), weed-proof mulching+white mulching(F+B), straw mulching(J)and no mulching(CK), were studied, and the differences of yield and quality of kiwifruit under corresponding treatments were compared. The soil water retention effects of mulching treatments were more significant than the contrast, and the soil moisture content in 0-50 cm soil layer under H, B, F, F+B and J treatments increased by 1.1%, 1.3%, 2.2%, 2.9% and 1.6%. With the increase of soil depth, the soil moisture content increased significantly. Soil temperature under single mulching treatments decreased by 0.8-2.5 ℃ in 0-25 cm soil layer, while the soil temperature under F+B treatment increased by 0.9 ℃, and the diurnal variation of temperature under treatments decreased by 0.9-2.1 ℃. Compared with CK, each mulching treatment increased single fruit weight by 0.1%-7.7%, and the effect of F treatment was particularly significant. Meanwhile, mulching treatment had a great effect on the ratio of sugar to acid, which could increase the ratio of sugar to acid by 3.8%-33.6%.The mulching of F could improve the soil moisture, heat condition, and the yield and quality of kiwifruit. It is the more suitable covering method for orchard management in this area.
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Received: 07 June 2021
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