Study on Appropriate Sowing Rate and Seedling Age of the New Late Indica Hybrid Rice Combination Tianfengyou 134

With the new three-line late indica hybrid rice combination Tianfengyou 134 as material,the effects of different seeding rate and seedling age on the seedling quality,growing process,rice quality and final output were studied.The suit-able seeding rate,appropriate seedling age and key measures for high yield cultivation of the rice variety were summarized.The results indicated that the best seedling age was 30d and not longer than 35d;the suitable leaf age of transplanting was around 7 for late-season regular cultivation;the phase with 9 leaves was its premature heading's critical leaf age;the seed-ing rate could reach 225.0 kg / hm2 under suitable seedling age condition;this variety had a high harvest index,large thou-sand kernel weight and strong adaptability;scattered seeding for healthy seedlings and increasing tillers to promote percent-age of earbearing tillers were key measures for high yield cultivation.