In cold regkm, the practice in increasing panicles per unit land area and grains per panicle could not meet the need of yield increasing and quality improving in rice production in the future. More attention should be paid to increase the part of plump grains because blighted grain, i.e. poor grain-filled grain is the bar of yield increasing in rice production.
Thirty-one cultivars/lines released in HLJ province were used in the studies. Studies by means of leaf cutting, spikelet thinning, fertil...
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