土壤水分对棉花产量和纤维品质的影响

INFLUENCE OF SOIL MOISTURE CONTENT ON YIELDS AND QUALITY OF COTTON

1988～1989年在水泥测坑和活动遮雨篷的控制下,研究棉花铃期至吐絮期土壤水分对棉花产量和纤维品质的影响。并用^(14)C示踪研究了土壤水分对产量和纤维品质影响的机理。同时用模糊数学的方法对构成产量和纤维品质的诸指标进行综合评判。结果表明,土壤持水量在75％时皮棉产量最高;土壤持水量在65％时棉纤维品质最佳。并发现棉株主茎倒3叶的叶细胞汁浓度与土壤水分呈线性关系,以及花铃期水分管理的相应形态指标。

Yields and quality of cotton with different relative moisture in soil was studied during the dates as follows: flowering-boll stage, boll opening stage in the testing plot of cement and acting canvas roof in 1988～1989. Mechanism of influence of different relative moisture in soil on yields and quality with^(14) C tracer element were also studied comprehensive review on the different indication of yield and quality wich the fuzzy mathematics were obtained. The results indicaled that the cotton lint yield was the highest under 75% relative soil moisture capacity condition. The quality of lint cotton was the best under 65% relative soil moisture capacity condition. Moreover, we found the liner relation between the relative soil moisture capacity and the cell juice concentration of the leaf which is on the third node from the top of the stem, and xhe indication of water management in soil during the flowering-boll stage was established.