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1983年,我县部分社队棉花营养钵成苗率一般很低,平均为34%,高的为85%,低的几乎无苗。影响成苗率的主要原因:①钵土不好,生土生肥。据我们在淅河、万店公社12个大队调查,钵土完全用陈墙土的苗床成苗率为24.6%,钵土渗入大量生鸡粪的为6%,用多年的红苕窖土制钵和钵土渗有生水粪的完全无苗,钵土混进机油或柴油的成苗率也极低。②种子素质不好。成苗率低的社队,一般采用未经选种的“统子”进钵,因而常出现病苗、弱苗,抗逆性差,遇早春不利气候极易死苗。特别是用秋桃嫩子进钵的成苗率更低,一般只有6%。③苗床管理不善。苗床管理不当,其原因较多:一是苗床低洼,排水不良,水溃烂根死苗。二是播后钵与钵间未填土,不保墒,易成干钵,影
In 1983, some of the commune cotton fiber nutrition bowls in our county had very low seedling rates, with an average of 34% and a high of 85%, with little or no seedlings. Affect the rate of seedlings into the main reasons: ① bowl soil is not good, raw soil fat. According to our investigation in Bahe and Wandian commune 12 brigade, the soil-borne soil seedling rate is 24.6%, the soil infiltration into large amount of chicken manure is 6%, with many years of red clay pit pot And bowl soil infiltration of raw water completely no seedlings, soil mixed with oil or diesel seedling rate is also very low. ② seed quality is not good. The commune with low seedling rate generally adopts the “unofficial” system of non-selected seedlings, which often results in sick seedlings, weak seedlings and poor resistance. In the early spring, unfavorable weather is extremely vulnerable. In particular, with autumn peach seedlings into the lower the rate of seedlings, usually only 6%. ③ poor management of seedbed. Mismanagement of beds, for many reasons: First, low bed, poor drainage, water fester root die. Second, after sowing bowl and the bowl is not filled, not preserving soil, easy to dry bowl, shadow