Effects of plastic film mulching cultivation under non-flooded condition on rice quality
2007
Lu, X. | Wu, L. | Pang, L. | Li, Y. | Wu-O, Jess | Shi, C. | Zhang, F.
Plastic film mulching cultivation under non-flooded condition (PFMC), a new high-efficiency and water-saving cultivation technique, has been adopted and developed in many regions of china since the 1980s. Field experiments were conducted to evaluate the effects of PFMC on rice quality in three agro-ecosystems (plain, basin and mountainous area) in 2001. The experiment consisted of three treatments, which were conventional flooded cultivation (CFC), PFMC and non-mulching cultivation (NMC) under non-flooded condition in a randomized complete block design with three replications. Compared with CFC, PFMC increased head-milled rice recovery (with the exception of plain area), rice transparency and alkali spreading value, but slightly decreased gel consistency and obviously decreased chalky grain rate. Compared with NMC, those quality traits under PFMC were changeable at different sites. There were no significant differences for brown rice rate (except hilly area), milling rice quality and amylose content across treatments. In addition, nutritional quality under PFMC was notably improved in comparison with CFC and NMC. With few exceptions, the protein content, total amino acid content, individual amino acid content and Lys content of rice decreased in the order of PFMC > NMC > CFC. In general, rice quality is affected by each agro-ecosystem and cultivation system to different degrees. PFMC had more influence on rice quality in hilly region than plain and basin regions.
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