Effects of plastic film mulching cultivation under non‐flooded condition on rice quality

Abstract

Plastic film mulching cultivation under non-flooded condition (PFMC), a new high-efficiency and watersaving 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.

Effects of iron and zinc foliar applications on rice plants and their grain accumulation and grain nutritional quality

“…Fe, Zn), PC and TAAC. 28 According to the results obtained in the present study, the foliar application of Fe-and Zn-containing solutions could improve Fe and Zn concentrations significantly, while a positive effect was also observed on rice PC and TAAC.…”

Impacts of Combination of Foliar Iron and Boron Application on Iron Biofortification and Nutritional Quality of Rice Grain

“…The nutritional quality of rice was mostly evaluated by the micronutrients, e.g., Fe and Zn, the protein content and the amino acids contents (Lu et al, 2007). In light of the results obtained in the present study, foliar Fe(II)-AA and B complex application could improve the nutritive levels of rice although there was no significant improvement on grain yield (Data not shown).…”

Approaches to achieve high grain yield and high resource use efficiency in rice

“…During the past 20 years, the annual water shortage for irrigation in China's agriculture was 3Â10 12 L, and drought occurred over 2.0Â10 8 -2.6Â 10 8 hm 2 . Even in the southeast of China, which is usually considered as a water-rich area, 1.6Â10 6 -2.0Â10 6 hm 2 of rice suffered seriously from seasonal drought [13,14] . Furthermore, WUE for rice irrigation (grain yield over amount of irrigation water) is rather low in China, where irrigation water consumption is 30%-40% higher, while WUE is 40%-50% lower, than in the United States of America under similar seasonal rainfall conditions [15] .…”