| 不同免耕模式对水稻产量及土壤理化性状的影响 |
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| 作者姓名： | 江泽普 黄绍民 韦广泼 陈伯伦 蒙炎成 苏天明 李振经 |
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| 作者单位： | 广西农业科学院土肥所 南宁530007(江泽普，韦广泼，蒙炎成，苏天明)，广西农业科学院水稻所 南宁530007(黄绍民，李振经)，广西农业科学院科技处 南宁530007(陈伯伦) |
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| 基金项目： | 广西科学基金应用基础研究专项 |
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| 摘 要： | 为了研究不同免耕栽培模式对水稻产量及土壤理化性状有何不同影响,采用田间定位试验,以常规插秧为对照,研究免耕直播和免耕抛秧对水稻产量的影响及土壤理化性质变化。结果表明:此试验条件下,免耕直播前期分蘖速度较快,株高、结实率及产量都较高,穗粒数和千粒重则与常规插秧相当,而免耕抛秧有效穗较多,但穗粒数、结实率、千粒重及产量均较低。在土壤理化性状方面,与常规插秧比,免耕栽培稻田表层(0～5cm)土壤有机质增加,腐殖质品质改善,>0.25mm水稳性大团聚体、全量氮、速效磷和速效钾养分含量都有提高。两种免耕栽培模式中,免耕直播的腐殖质品质、>0.25mm大粒团聚体含量及速效磷高于免耕抛秧,而土壤有机质总量和速效钾则低于免耕抛秧。免耕栽培模式有利于稻田表层土壤肥力的改善;此试验条件下,免耕直播更有利于提高水稻产量。
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| 关 键 词： | 免耕模式 水稻产量 土壤理化性状 |
Effects of Different No-tillage Modes on Rice Yield and Properties of Paddy Soil |
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| Authors: | Jiang Zepu Huang Shaomin Wei Guangpo Chen Bolun Meng Yancheng Su Tianming Li Zhenjing |
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| Institution: | (1Soil and Fertilizer Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007)
(2Rice Research Institute of Guangxi Academy of Agricultural Sciences, Nanning 530007)
(3Science and Technology Department, Guangxi Academy of Agricultural |
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| 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. |
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| Keywords: | no-tillage mode rice yield soil properties |
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