滇重楼播种技术研究

Yunnan Polyphylla Planting Technology Research

大田条件下播种的滇重楼种子出苗率低、出苗时间长和出苗不整齐,是滇重楼生产的瓶颈。本研究比较了直接播种、催芽播种、播种基质、播种深度、土壤水分等播种技术对滇重楼出苗率、出苗整齐度的影响。直接播种:以0.8 cm^2≤S(种子投影面积)<1 cm^2出苗率最高,依次为S≥1 cm^2,0.65 cm2≤S<0.8 cm^2,0.5 cm2≤S<0.65 cm^2,S<0.5 cm^2的种子不出苗;播种基质为土-沙组合出苗时间较腐叶土基质提前13个月,播后18个月出苗率搞出了26.33%。催芽播种胚根长度越长其出苗率相对较高,当胚根长度是种子直径4倍及以上(L≥2 cm)时出苗率、出苗最整齐。直接播种和催芽播种对土壤水分和播种深度要求基本一致。直接播种时,应优选种子;催芽播种,应在胚根长度L≥2 cm时播种。播种深度0-2 cm适宜,一般不宜超过4 cm,苗床土壤应保持潮湿。

Field under the condition of Paris polyphylla var. Yunnanens is low seed germination rate, e- mergence time and emergence not neat, is always the bottleneck of Paris polyphylla var.yunnanensis pro- duction. To explore the factors in Paris polyphylla var.Yunnanensis emergence rate, We compared the field under the condition of seed size, length of radicle, seeding matrix, sowing depth, soil moisture effects on Paris polyphylla var. Yurmanensis seed germination rate. The medium size seed （0.8cm2≤ S〈1cm2） is level lseed for its highest germination rate , Followed by secondary seeds（S〉≥1cm2）, level 3 seed （0.65cm2≤S〈0.8cm2）, four seeds （0.5cm2≤S〈0.65cm2）, the seed （S〈0.5cm2）germination rate is zero, should be rejected in the production. The longer the length of radicle its emergence rate is Relatively high, When the radicle length is seed diameter 4 times and above （L ≥2cm） is the highest germination rate, Five months after seeding emergence rate can reach 23.82%, 73.43% after 6 months, after 18 months of 80.67%. Its germination rate on average than radicle length L 〈 0.5 cm higher than 55.89%, radicle length 0.5 cm L 〈 1.0 cm higher than 36.02%, radicle lengthl.0cm--.〈 L〈2cm higher than 14.37%, difference is very significant.Seeding matrix of soil - sand combination, no. 2 seed ger- mination rate, five months after planting is 13.25%, 6 months after planting was 32.75%, 7 months after planting was 33.5%, seeding after 18 months of 89%; Leaf soil matrix, seeding for 18 months toemergence, emergence rate was 62.67%.;straight seeded, shoud be graded seed.;germinating seeds sow, Radicle length（L≥2cm） is the best time to sow;the difference is very significant.Sowing depth 0-2 cm is appropriate, should not be commonly more than 4 cm, seedbed soil should be kept damp 60% -70% （soil moisture）, avoid secondary dormancy.