沟灌渗透对直播水稻干物质积累和产量的影响

采用田间对比试验、植株分析方法,研究了相同畦宽(200cm)、不同灌水量的沟灌渗透栽培和常规淹水栽培对直播水稻茎蘖生长及干物质积累的影响。结果表明:不同时期直播水稻茎蘖生长、干物质积累、冠层叶性状和产量在不同处理之间均存在一定的差异;其中,以处理1(节水38.6%的沟灌渗透)的茎蘖生长适宜,分蘖质量高,干物质积累量大,冠层叶叶绿素含量高,有效穗数、穗长、穗粒数、实粒数和千粒重显著高于常规淹水处理,增产达8.74%。

Effects of water penetration in furrow irrigation on the dry matter accumulation and yield of directly sown rice

The pairing method and the plant analysis were adopted to study the effects of water penetrations in furrow irrigations with different water amounts on tiller growth and dry matter accumulation of directly sown rice in rice farming with furrow irrigation and conventional rice farming. The results revealed that directly sown at different dates, rice differed in tiller growth, dry matter accumulation, canopy leaf characters, and yield among different treatments to some extent. In treatment 1 (furrow irrigation saving water by 38.6%) rice tillers grew well, had good quality, accumulated high amount of dry matter and formed a high chlorophyll percentage in canopy leaf so that its seed-setting-spike number, spike length, seed number per spike, heavy kernel number per spike and 1000-kernel weight were significantly higher than those in the control and the rice yield rose by 8.74%.