Increasing pit‐planting density of rice varieties with different panicle types to improves sink characteristics and rice yield under alternate wetting and drying irrigation

The Chinese government regards ensuring food security and developing water-saving agriculture as an important national strategy that carrying out relevant research has practical significance production application value. A two-year field experiment was conducted to explore the compensation potential in rice yield by using varieties with different panicle size under two water management regimes (conventional or CWM alternate wetting drying AWD). results showed large variety resulted greater yield, crop productivity, spikelet density, dry matter accumulation translocation, photosynthesis. Compared CWM, AWD had little effect on yield. However, appropriate planting achieved a grain compared CWM. Moreover, increased productivity grain-filling efficiency. loss of spikelets could be compensated increasing density. Although reduced tillering number, it photosynthetic rate, its translocation grain, leaf area index. In addition, adverse effects growth caused alleviated density rice. Therefore, can used save maintain high drying.