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为探明排水条件良好水田直播栽培水稻的生长习性,比较了水稻品种“花成”在直播和移栽情况下的生理生态特性。光合作用和呼吸作用直播稻较移栽稻低。从分蘖到抽穗阶段叶绿素含量和根系活性直播稻较移栽稻低,而在抽穗后15天则高于机栽稻。专化叶面积从分蘖到抽穗前15天机械移栽稻(下译为机栽稻)高于直播稻,从抽穗到抽穗后15天机栽稻则低于直播稻。除剑叶和第一节间外,叶柄和节间长度直播稻长于机栽稻。机栽稻的地上部分干重较高,而直播稻的地下部分于重较高。从分蘖到抽穗阶段直播稻的作物生长率(CGR)、相对生长率(RGR)、净同化率(NAR)和叶面积指数(LAI)高于机栽稻,而穗数则是机栽稻高。
In order to investigate the growth habit of rice with direct seeding and transplanting under the condition of good drainage, the physiological and ecological characteristics of the rice variety “Huacheng” under direct seeding and transplanting were compared. Photosynthesis and respiration were lower in direct seeding rice than transplanting rice. The chlorophyll content and root activity of direct seeding rice from tillering stage to heading stage were lower than that of transplanting rice, but higher than that of the planted rice 15 days after heading. Specialized leaf area from tillering to 15 days before heading mechanical transplanting rice (translates into machine-planted rice) is higher than direct-seeded rice, from heading to 15 days after heading machine rice is lower than direct-seeded rice. In addition to the flag leaf and the first internode, petiole and internode length live rice is longer than the machine planted rice. The dry weight of aerial parts of rice was higher, while that of direct seeding rice was higher. The crop growth rate (CGR), relative growth rate (RGR), net assimilation rate (NAR) and leaf area index (LAI) of direct seeding rice from tillering stage to heading stage were higher than those of planted rice, .