关键词: 高粱, 高粱, A2细胞质, 育性反应, 生产利用

Abstract: In order to study the effects of different no-tillage modes on rice yield and properties of paddy soil, a fixed field experiment was conducted to study the effects of no-tillage direct seeding (NTDS) and no-tillage cast seedling (NTCS) on rice yield and changes of the physic-chemical properties of paddy soil using conventional transplanting seedling (CTS) as control. The results showed that NTDS displayed fastest tillering rate in the prophase of tillering stage, the plant height, the rate of burliness and the rice yield of NTDS were highest among three modes under the test, the grains per spike and the weight per 1000-grains of NTDS were same as that of CTS; The effective spikes of NTCS was most among three modes, however, the grains per spike, the rate of burliness, the weight per 1000-grains and the rice yield of NTCS was lowest among three modes. Compared with CTS about the soil properties, the contents of soil organic matter, the total N and available P, K, and the percentage of aggregates in the size group of > 0.25 mm of the no-tillage modes increased in the top layer(0~5cm), humus quality of the no-tillage modes improved. The quality of humus, the percentage of aggregates in the size group of >0.25 mm, and the content of available P of NTDS were better than that of NTCS, however, soil organic matter content and the content of available K of NTDS was lower than that of NTCS. The no-tillage planting modes are propitious to improve the paddy soil fertility in the top layer; And NTDS is benefit to increase the rice yield under the test.