New potato planting method in paddy field

1. During the growing season, the growth temperature of potato is low, and the growth period is short. In Jiangnan and even Jianghuai, it is an early spring or late autumn crop that can connect with single season rice. "Spring potato-middle rice" is cooked twice a year: Spring potato is planted in late January or mid-February and harvested in late May to obtain full yield; "Early-middle rice-qiut potato" is cooked twice a year: Qiutao After mid-season rice was harvested before September 10, it was harvested after falling frost in late November and 4-60% yield was obtained.

Second, the technical points

1. Prepare no-tillage paddy fields and excavate high-yielding ditch (drainage and irrigation ditch). The ditch width is 15cm, depth is 15cm, and adjacent ditch is 150cm. The excavated soil should not be piled up on the ditch. It should be slightly arched to avoid accumulation of water. Normal grasses and rice bran do not affect planting. If large grasses can be toppled or skim, do not use herbicides.

2. Choose suitable early maturing varieties, such as Dongnong 303, Zhongshu No. 3, or local farm breeds. Seed germ should be germinated. It is better to sow with strong buds with a length of about 1 cm. Generally, about 30 grams of seedlings of small seeds are better for sowing; whole potatoes should be cut, and each cut must have at least one robust bud. The cut is more than 1 cm away from the shoots. The shape of the cuts is preferably tetrahedron. Avoid cutting into thin slices. Cut pieces can be used 50% carbendazim WP 250 ~ 500 times liquid immersed, dried slightly with plant ash mix, can be sown the next day.

3. Seed 4 to 5 rows per seeding, spacing 30 cm, plant spacing 25 cm, leaving 20 cm each. Place the seed potatoes on the surface of the soil, shoot the eyes close to the soil surface, and then evenly cover the straw of 8 to 10 cm thick (the so-called 8 to 10 cm is not the thickness after the straw is compacted, but “gently pats, Pressing but not real"). Straw should be spread over the entire surface without leaving empty space.

4. Fertilization According to the paddy field fertility and yield requirements, apply base fertilizer once and not top-dressing. If decomposed manure is used as a basal fertilizer, the soil can be properly divided and placed directly on seed potatoes when sown; if chemical fertilizers are used, composite grain fertilizers are preferred, and fertilizers can be placed in the middle of two seed potatoes, or they can be placed on the seed potatoes. Seed next to the seed but need to maintain a distance of 5 cm or more to prevent bad seeds, Mushi 50 to 60 kg.

5. Natural precipitation for irrigation has generally met the requirements of this technology. However, the new straw absorbs less water and is slower, and it is easier to dry so that the potato seedlings can be affected by drought. The timely irrigation of appropriate amount of water can be made in the high yield trough, and the water layer should be shallow so as not to shift the straw to degree, and be drained and drained in time. When sowing in the autumn, the weather is high and the temperature is high. Special attention should be paid to timely irrigation to ensure that Miao Qi Miao is strong. On the contrary, when rice straw is once rotted, its water retention capacity is enhanced, especially the straw that is close to the soil surface has high humidity and is not easy to dry, which is unfavorable to the growth of potato seedlings. Therefore, it is necessary to pay attention to drainage in rainy weather.

6. Plant protection straw covering the entire process can inhibit the growth of weeds, generally do not weeding; disease, pests are also light, you can do without pesticides.

7. No paddy fields are harvested. The result of straw cover is that more than 70% of the tubers are on the soil surface. The rice straw can be picked by prying open the straw; a few potato chips that grow in cracks or pores are also very shallow and easy to dig out. With the permission of the labor force, it is also possible to harvest in stages, that is, to gently extract and harvest the potato chips that have grown up, and then cover the straw so that the small potato pieces can continue to grow. This can not only select the best market conditions, timely listing, but also have a higher yield, improve overall economic efficiency.

Third, two key technical points worth noting

1. Different from Miao Qi, Miao Zhuang and seed sowing, potatoes are propagated through tubers. It takes about 20 to 30 days to emerge in the conventional method and is always uneven. During this period, more attention should be paid to the following points:

(1) Select high-quality seed potatoes and store them properly: Seed and storage of seed potatoes should pay attention to temperature and humidity, avoid local temperature difference during stacking, and shoots of different lengths.

(2) To break the dormancy and promote proper germination: The germination length is appropriate to be about 1 cm. The long buds are easy to be broken when sowing and need to wait for other latent buds to germinate. On the contrary, lagging causes the seeds to be severely incomplete.

(3) Straw is neat and covered with appropriate thickness: Unlike straw, rice straw is not about 3 cm of loose soil but 8–10 cm thick straw. Straw is too thick and not only is the emergence slow, but also the stem base is slender and weak. If the straw is not uniform, the emergence of incomplete seedlings will obviously increase. Neatly laid straws are prone to emergence; on the contrary, if the straws are intertwined, there are sometimes “card seedlings”.

(4) Timely irrigation and prevention of dryness and flooding.

2. The key to preventing the production of green sweet potatoes is that the straw layer cannot leak light, and precautions should be taken from the following points.

(1) Spread the straw and spread it over the surface without leaving blank: Spread the tile over the entire surface and leave it empty. If straws are laid in a sloping manner, rice straw can be saved. However, the potato pieces near both sides of the bowl may be green by varying degrees due to light exposure. The rate of green potatoes in the experiment was as high as 15%.

(2) According to the straw quality, ensure the grass thickness: As mentioned before, the straw should not be covered too thick. However, if straw is too thin, it will easily leak light and increase the rate of sweet potato. Tests have shown that straw thickness is suitable for 8 to 10 cm.

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