Yield Formation Characteristics of Conventional Japonica Rice under Reduced Nitrogen and Increased Planting Density
1st author: 2899183588@qq.com
Received date: 2021-08-12
Online published: 2021-11-20
The effects of reducing nitrogen fertilizer and increasing planting density on yield formation characteristics of conventional japonica rice were studied using conventional japonica rice Nangeng 9108 and Nangeng 5718 as test materials. The results showed that the yield of Nangeng 9108 and Nangeng 5718 under T1 treatment （10% reduction in nitrogen and 15% increase in density compared with conventional cultivation） were basically the same as those under CK （conventional high-yield cultivation）, the yield under T2 （20% reduction in nitrogen and 30% increase in density compared with conventional cultivation） and T3 （30% reduction in nitrogen and 45% increase in density compared with conventional cultivation） treatments was significantly lower than that of CK. The number of effective panicles and the number of grains per panicle of the tested varieties under T1 treatment was equivalent to that of CK. The number of effective panicles, grains per panicle, and population spikelets in T2 and T3 treatments were significantly lower than those of CK, and the seed setting rate and thousand-grain weight were also lower than those of T1 treatment and CK. This study indicated appropriate treatment of reducing nitrogen fertilizer and increasing planting density realizes the dual goals of high grain yield and lower nitrogen application rate for conventional japonica rice.
Xiang ZHANG, Tianyi SHI, Qigen DAI, Tianyao MENG, Huanhe WEI . Yield Formation Characteristics of Conventional Japonica Rice under Reduced Nitrogen and Increased Planting Density[J]. China Rice, 2021 , 27(6) : 53 -57 . DOI: 10.3969/j.issn.1006-8082.2021.06.011
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