不同定植密度对朝天椒生理指标及产量的影响

Effect of Plantation Density on Growth and Yield of Chili Peppers

为探讨朝天椒高产栽培最佳定植密度和群体生理指标,以豫欣12号春椒为研究对象,通过7个定植密度试验,研究了不同定植密度对朝天椒生长发育时期、植株性状、叶面积系数、光合生产率、干物质积累及产量的影响。结果表明,豫欣12号春椒以18万株/hm2处理的产量最高(5 740.5kg/hm2),始收期最大叶面积系数为7.35,光合生产率达到2.55g/(m2.d),盛收期叶面积系数为6.61,平均光合生产率2.36g/(m2.d)。在6万～24万株/hm2定植密度范围内,定植密度与产量呈二次曲线关系,经计算,最佳定植密度为18.57万株/hm2,产量5 703.0kg/hm2,与实际产量十分吻合。

In order to investigate the optimal plantation density and the group physiological indexes of chili peppers,the effect of different plantation density on growth period,plant character,leaf area index,photosynthetic productivity,dry matter accumulation and yield of chili pepper Yuxin 12 were studied using 7 plantation densities.The result showed that the yield of spring pepper Yuxin 12 was highest（5 740.5 kg/ha） when treated with 180 thousand strains/ha;the maximum leaf area index and photosynthetic productivity reached 7.35 and 2.55 g/（m^2·d） in earlier harvest period,and in harvest period leaf area index was still maintained at 6.61 with the average photosynthetic productivity of 2.36 g/（m^2·d）.As for the plantation density in the range of 60-240 thousand strains/ha,there was a relation of quadratic curve between plantation density and yield：=136.88＋39.28x-1.59x2（F=3 466.39＊ ＊）,the best plantation density was 185.7 thousand strains/ha and the highest yield was 5 703 kg/ha,which was consistent with the actual production.