论文部分内容阅读
试验结果表明,免耕直播稻比常耕抛秧稻分蘖早10~13 d,分蘖节位低1个节位,成穗率高6.82个百分点;单株总根数多88.9条、根总长多902.9 cm、根系体积多4.7 cm3、根系干重多0.91 g;后期绿叶数多0.7张,假茎粗0.08 cm;每公顷有效穗多24.15万穗,每穗总粒数多3.9粒,每穗实粒数多5.7粒,结实率高2.02个百分点。不同的耕作方式相比,直播稻比抛栽稻生育期缩短3~6 d;穗粒结构以稻草还田免耕直播稻最好,产量也最高,比非还田免耕直播稻增产4.78%,比免耕抛秧稻增产6.39%,比常耕直播稻增产11.79%,比常耕抛秧稻增产11.39%。不同留桩高度对免耕直播稻产量没有直接的影响,免耕直播稻纹枯病危害较轻,特别是稻草还田免耕直播稻纹枯病最轻。
The results showed that the no-tillage direct-sowing rice had 10 ~ 13 d lower tillers than the tillering of the top-sowing rice and the percentage of ear-forming ear was 6.82%. The total root number per plant was 88.9, 902.9 cm, 4.7 cm3 in root volume, 0.91 g in root dry weight, 0.7 in late leaf stage and 0.08 cm in pseudostem, respectively. There were 241,500 spikes per hectare and 3.9 spikes per spike More grains 5.7, 2.02 percentage points high seed setting. Compared with different tillage methods, the sowing duration of direct sowing rice was 3 ~ 6 days shorter than that of throwing sowing rice. The direct sowing rice was the best and the yield was the highest, , Which increased 6.39% than that of no-tillage and throwing rice, 11.79% more than that of direct-seeded rice, and 11.39% more than that of normal rice. There is no direct impact on the yield of no-tillage direct-seeded rice by different pile-holding heights, and the no-tillage direct-seeded rice sheath blight is less harmful. In particular, the no-tillage direct-seeded rice sheath blight is the least.