Precision hill-drop direct seeding via mechanical drilling is a novel planting pattern that provides benefits such as high grain yields and lodging resistance in direct-seeded rice in South China, however, the effects of different fertilization methods on yield performance and lodging resistance capacity under mechanical direct seeding systems are still unclear. Hence, a field experiment was conducted over two years with two early indica cultivars to determine the grain yield formation and lodging characteristic of the rice plants under three fertilization methods, including furrow ridging fertilization (FRF), surface fertilization (SF), and whole-layer fertilization (WLF). We found that FRF significantly increased the grain yields of the two cultivars by 6.04 %–28.25 % compared with SF and WLF; this result was attributed to the high panicle and biomass production. FRF also significantly improved the seedling emergence rate of the early indica rice cultivars and increased the aboveground total dry weight and harvest index. In addition, compared with SF and WLF, FRF significantly enhanced the stem lodging resistance of direct-seeded rice cultivars and reduced the lodging index, especially at the third internode. The physical parameters of the stem, including the internode length, thickness and wall thickness, dry weight of internode, and lignin content of the test internodes, improved under FRF due to the high associated breaking-resistance strength and lodging index. These results indicate that furrow ridging fertilization was beneficial for increasing the grain yield and lodging resistance of direct-seeded early indica rice.

机械钻孔精准落山直播是一种新型的种植方式，具有高产、抗倒伏等优势，在华南地区直播水稻中，不同施肥方式对产量性状和抗倒伏能力的影响存在较大差异。机械直播系统仍不清楚。因此，对两个早期籼稻进行了两年多的田间试验栽培品种来确定在三种施肥方法下水稻植株的籽粒产量形成和倒伏特性，包括沟垄施肥（FRF）、表面施肥（SF）和全层施肥（WLF）。我们发现，与SF 和WLF 相比，FRF 使两个品种的籽粒产量显着提高了6.04 %–28.25 %；这一结果归因于高穗和生物量产量。FRF还显着提高了早籼的出苗率水稻品种，增加地上总干重和收获指数。此外，与SF和WLF相比，FRF显着增强了直播水稻品种的茎秆抗倒伏性，降低了倒伏指数，尤其是在第三节间。由于相关的抗断裂强度和倒伏指数高，茎的物理参数，包括节间长度、厚度和壁厚、节间干重和测试节间的木质素含量，在 FRF 下得到改善。这些结果表明，沟垄施肥有利于提高直播早籼稻的产量和抗倒伏能力。