Can Drip Irrigation without Film Mulching Be Favorable for Potato Growth in Eastern China?

The main measures to improve potato cultivation in eastern China are film mulching and drip irrigation. However, the can cause soil pollution inhibit plant growth because of non-degradable polyethylene, which is component film. Whether irrigation without yield needs be fully explored. Field experiments were conducted at Special Potato Experimental Station, Agricultural University, Rizhao City, Shandong Province, China, 2019 2020 investigate effects wetted percentage on water temperature distribution, as well growth. In 2019, three treatments with 50% set up: black plastic (BMP2), transparent (TMP2), no (NMP2). 2020, added existing treatments: (NMP0) 25% (NMP1), (NMP2), 75% (NMP3); (BMP0) (BMP2); (TMP0) (TMP2). results indicated that did not have a significant effect (p < 0.05) temperature, growth, yield. Irrigation reduced by range 0.4 3.0 °C during high air season. significantly increased height, stem thickness, under treatment could 16.0–24.9% greater than non-irrigation treatment. highest use efficiency (IWUE) was achieved P1 P2, beneficial for saving. NMP1 NMP2 had 83.4% 81.0% higher IWUE NMP3 Considering environmental protection, resource conservation, economic efficiency, P2 suitable China.